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A number sign (#) is used with this entry because pachyonychia congenita-4 (PC4) is caused by heterozygous mutation in the KRT6B gene (148042) on chromosome 12q13. Description Pachyonychia congenita (PC) is an autosomal dominant genodermatosis with the main clinical features of hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts. Although the condition had previously been subdivided clinically into Jadassohn-Lewandowsky PC type 1 and Jackson-Lawler PC type 2, patients with PC were later found to have a mixed constellation of both types, leading to a classification of PC based on genotype (summary by Sybert, 2010; Eliason et al., 2012; McLean et al., 2011). For a discussion of genetic heterogeneity of pachyonychia congenita, see 167200. Historical Classification of Pachyonychia Congenita Gorlin et al. (1976) suggested that 2 distinct syndromes are subsumed under the designation pachyonychia congenita.
Pachyonychia congenita (PC) is a rare genodermatosis predominantly featuring painful palmoplantar keratoderma, thickened nails, cysts and whitish oral mucosa. Epidemiology The prevalence is not known but approximately 1000 patients have been registered to date worldwide. Clinical description PC presents clinically as a spectrum of conditions. PC onset is variable with most cases manifesting soon after birth, others becoming clinically apparent only in late childhood and rarely in adulthood. The first signs of the disease usually are thickened nails or neonatal teeth.
Pachyonychia congenita (PC) is a rare inherited condition that primarily affects the nails and skin. The fingernails and toenails may be thickened and abnormally shaped . Affected people can also develop painful calluses and blisters on the soles of their feet and less frequently on the palms of their hands ( palmoplantar keratoderma ). Additional features include white patches on the tongue and inside of the mouth (leukokeratosis); bumps around the elbows, knees, and waistline (follicular hyperkeratosis); and cysts of various types including steatocystoma. Features may vary among affected people depending on their specific mutation.
For a phenotypic description and a discussion of genetic heterogeneity of pachyonychia congenita, see 167200. Inheritance Chong-Hai and Rajagopalan (1977) suggested autosomal recessive inheritance of pachyonychia congenita in a 4-year-old Malaysian girl with first-cousin parents, although they recognized new dominant mutation as a possibility. See also Sivasundram et al. (1985). INHERITANCE - Autosomal recessive HEAD & NECK Mouth - No oral leukoplakia SKIN, NAILS, & HAIR Skin - Horny papules (face, leg, buttocks) - No palmoplantar hyperkeratosis - No hyperhidrosis Nails - Episodic inflammatory swelling of nail bed - Recurrent shedding of nails - Hard,thickened nails (pachyonychia) - Subungual hyperkeratosis MISCELLANEOUS - See also pachyonychia congenita, type 3 (PC1, 167200 ) ▲ Close
A number sign (#) is used with this entry because pachyonychia congenita-3 (PC3) is caused by heterozygous mutation in the keratin-6a gene (KRT6A; 148041) on chromosome 12q13. Description Pachyonychia congenita (PC) is an autosomal dominant genodermatosis with the main clinical features of hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts. Although the condition had previously been subdivided clinically into Jadassohn-Lewandowsky PC type 1 and Jackson-Lawler PC type 2, patients with PC were later found to have a mixed constellation of both types, leading to a classification of PC based on genotype (summary by Sybert, 2010; Eliason et al., 2012; McLean et al., 2011). For a discussion of genetic heterogeneity of pachyonychia congenita, see 167200. Historical Classification of Pachyonychia Congenita Gorlin et al. (1976) suggested that 2 distinct syndromes are subsumed under the designation pachyonychia congenita.
A number sign (#) is used with this entry because of evidence that pachyonychia congenita-2 (PC2) is caused by heterozygous mutation in the KRT17 gene (148069) on chromosome 17q21. Description Pachyonychia congenita (PC) is an autosomal dominant genodermatosis with the main clinical features of hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts. Although the condition had previously been subdivided clinically into Jadassohn-Lewandowsky PC type 1 and Jackson-Lawler PC type 2, patients with PC were later found to have a mixed constellation of both types, leading to a classification of PC based on genotype (summary by Sybert, 2010; Eliason et al., 2012; McLean et al., 2011). For a discussion of genetic heterogeneity of pachyonychia congenita, see 167200. Historical Classification of Pachyonychia Congenita Gorlin et al. (1976) suggested that 2 distinct syndromes are subsumed under the designation pachyonychia congenita.
A number sign (#) is used with this entry because pachyonychia congenita-1 (PC1) is caused by heterozygous mutation in the keratin-16 gene (KRT16; 148067) on chromosome 17q21. Description Pachyonychia congenita (PC) is an autosomal dominant genodermatosis with the main clinical features of hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts. Although the condition had previously been subdivided clinically into Jadassohn-Lewandowsky PC type 1 and Jackson-Lawler PC type 2, patients with PC were later found to have a mixed constellation of both types, leading to a classification of PC based on genotype (summary by Sybert, 2010; Eliason et al., 2012; McLean et al., 2011). Historical Classification of Pachyonychia Congenita Gorlin et al. (1976) suggested that 2 distinct syndromes are subsumed under the designation pachyonychia congenita. PC type 1, the Jadassohn-Lewandowsky type, shows oral leukokeratosis.
. ^ "Deaths in the district of Inveresk and Musselburgh in the County of Edinburgh" . Statutory Deaths 689/00 0032 . ScotlandsPeople . Retrieved 11 April 2015 . External links [ edit ] Classification D ICD-O : 8011/0, 8011/3 Wikimedia Commons has media related to Epithelioma .
The Lancet . 156 (4011): 89–95. doi : 10.1016/S0140-6736(00)65681-7 . ^ Weisse, Martin E (31 December 2000). ... The Lancet . 357 (9252): 299–301. doi : 10.1016/S0140-6736(00)03623-0 . PMID 11214144 . S2CID 35896288 . ^ Powell, KR (January 1979). ... The Journal of Pediatrics . 78 (6): 958–67. doi : 10.1016/S0022-3476(71)80425-0 . PMID 4252715 . ^ Morens, David M; Katz, Alan R; Melish, Marian E (31 May 2001). ... The Lancet . 357 (9273): 2059. doi : 10.1016/S0140-6736(00)05151-5 . PMID 11441870 . S2CID 35925579 .
A rare staphylococcal toxemia caused by epidermolytic toxins of Staphylococcus aureus and characterized by the appearance of widespread erythematous patches, on which large blisters develop. Upon rupture of these blisters, the skin appears reddish and scalded. The lesions typically begin in the face and rapidly expand to other parts of the body. The disease may be complicated by pneumonia and sepsis. It most commonly affects newborns and infants.
The Lancet . 156 (4011): 89–95. doi : 10.1016/S0140-6736(00)65681-7 . ^ a b c d Weisse, ME (31 December 2000). ... The Lancet . 357 (9252): 299–301. doi : 10.1016/S0140-6736(00)03623-0 . PMID 11214144 . S2CID 35896288 . ^ Dukes-Filatov disease at Who Named It?
Clinical Features Lisch et al. (1992) described 5 family members and 3 unrelated patients (4 males, 4 females), aged 23 to 71 years, with bilateral or unilateral, gray, band-shaped, and feathery opacities that sometimes appeared in whorled patterns. Retroillumination showed that the opacities consisted of intraepithelial, densely crowded, clear microcysts. Light and electron microscopy disclosed diffuse vacuolization of the cytoplasm of epithelial cells in the affected area. Visual acuity was so reduced in 3 patients that abrasion of the corneal epithelium was performed. The corneal abnormalities recurred within months, with the same reduction in visual acuity as before.
Lisch epithelial corneal dystrophy (LECD) is a very rare form of superficial corneal dystrophy characterized by feather-shaped opacities and microcysts in the corneal epithelium arranged in a band-shaped and sometimes whorled pattern, occasionally with impaired vision. Epidemiology Exact prevalence of this form of corneal dystrophy is not known but very few cases have been reported to date. LECD has been documented in one German family and in rare sporadic cases in Germany and the USA. Clinical description Lesions generally develop in childhood. Epithelial opacities are slowly progressive and painless blurred vision sometimes occurs after 60 years of age. Etiology The exact cause is unknown but appears to be genetic. The gene related to Lisch epithelial corneal dystrophy has been mapped to the short arm of the X chromosome (Xp22.3).
Clin Dermatol . 19 (1): 69–71. doi : 10.1016/S0738-081X(00)00215-7 . PMID 11369491 . ^ "Drugs that call for extra caution. ... New York: Simon Schuster. p. 56. ISBN 978-0-684-87309-1 . ^ M.d. Kamath, Bob (30 May 2007). ... Kendall Hunt Publishing. p. 25. ISBN 978-0-7872-8701-6 . ^ Ashton CH (2002).
Lippincott Williams & Wilkins. pp. 254–256. ISBN 0-7817-3905-5 . ^ a b c d e f g h i Smith, Melanie N. (2006-05-10). ... Cambridge University Press . p. 77. ISBN 1-900151-51-0 . ^ Papadakis, Maxine A.; Stephen J. ... McGraw-Hill Professional. p. 60. ISBN 0-07-145892-1 . ^ a b Bosze, Peter; David M. ... Informa Health Care. p. 66. ISBN 963-00-7356-0 . ^ "Cervical Polyps" (PDF) .
A rare photodermatosis characterized by the development of pruritic or painful vesicles in a photodistributed pattern in response to sunlight exposure. The lesions heal with permanent varioliform scarring. Ocular involvement, deformities of ears and nose, or contractures of the fingers may occasionally be observed. Systemic signs and symptoms are absent. The condition typically occurs in childhood and regresses spontaneously in adolescence or young adulthood.
With giant hemangiomas in small children, thrombocytopenia and red cell changes compatible with trauma ('microangiopathic hemolytic anemia') have been observed. The mechanism of the hematologic changes is obscure. No evidence of a simple genetic basis has been discovered. Propp and Scharfman (1966) reported a male infant with thrombocytopenia associated with a large hemangioma of the right arm and axilla. The patient had low platelet counts with a markedly diminished platelet survival time and an absence of platelet agglutinin or complement-fixing antibody. Radiochromate-tagged platelet studies suggested sequestration in the hemangioma, liver, and spleen.
Hemangioma thrombocytopenia syndrome is characterized by profound thrombocytopenia in association with two rare vascular tumors: kaposiform hemangioendotheliomas and tufted angiomas . The profound thrombocytopenia can cause life threatening bleeding and progress to a disseminated coagulopathy in patients with these tumors. The condition typically occurs in early infancy or childhood, although prenatal cases (diagnosed with the aid of ultrasonography), newborn presentations, and rare adult cases have been reported.
Kasabach-Merritt syndrome (KMS), also known as hemangioma-thrombocytopenia syndrome, is a rare disorder characterized by profound thrombocytopenia, microangiopathic hemolytic anemia, and subsequent consumptive coagulopathy in association with vascular tumors, particularly kaposiform hemangioendothelioma or tufted angioma.
Fitzpatrick's Dermatology in General Medicine (6th ed.). McGraw-Hill. ISBN 0-07-138076-0 . ^ James W, Berger T, Elston D (2005). Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. ISBN 0-7216-2921-0 . ^ Pardasani AG, Feldman SR, Clark AR (February 2000). ... Journal of the American Academy of Dermatology . 42 (5 Pt 2): 885–7. doi : 10.1016/s0190-9622(00)90263-9 . PMID 10767696 . ^ Mehlis S (2019).
Guttate psoriasis is a skin condition in which small, red, and scaly teardrop-shaped spots appear on the arms, legs, and middle of the body. It is a relatively uncommon form of psoriasis . The condition often develops very suddenly, and is usually triggered by an infection (e.g., strep throat, bacteria infection, upper respiratory infections or other viral infections). Other triggers include injury to the skin, including cuts, burns, and insect bites, certain malarial and heart medications, stress, sunburn, and excessive alcohol consumption. Treatment depends on the severity of the symptoms, ranging from at-home over the counter remedies to medicines that suppress the body's immune system to sunlight and phototherapy.
Characteristics [ edit ] Botellón usually begins around 11:00 p.m. and ends around 3:00 a.m. when many people move to a bar or club. ... Since botellón is usually a nighttime activity, Spain passed a law that prohibits stores to sell alcohol to the public after 10:00 p.m, hoping to persuade people to attend clubs or bars where alcohol must remain on site. [ citation needed ] However, the measure is a controversial one because people can still buy alcohol before the selling limit hour and consume it in public. ... CS1 maint: archived copy as title ( link ) ^ "Media España se cita en la Red para celebrar un macrobotellón el 17 de marzo" . 2006-03-07. ^ http://www.20minutos.es/noticia/97295/0/macrobotellones/ciudades/espana/ | Literally translated from Spanish ^ "El Ayuntamiento "no consentirá" el macrobotellón que se prepara en Moncloa" . 2006-03-07.
Hagerstown, MD: Lippincott Williams & Wilkins. p. 1150. ISBN 0-7817-2655-7 . Retrieved 2008-06-16 . ^ a b c d e f Scalea TM (2005). ... Boca Raton: CRC. pp. 26–32. ISBN 978-0-8493-8138-6 . Retrieved 2008-07-06 . ^ a b Porth, Carol (2007). ... Hagerstown, MD: Lippincott Williams & Wilkins. p. 838. ISBN 978-0-7817-7087-3 . Retrieved 2008-07-03 . ^ Pitkänen A, McIntosh TK (2006). ... Neurotrauma: New Insights Into Pathology and Treatment . Elsevier. pp. 13–19. ISBN 978-0-444-53017-2 . Retrieved 2008-06-10 . ^ a b Granacher RP (2007). ... Neuroscience . 101 (2): 289–95. doi : 10.1016/S0306-4522(00)00380-8 . PMID 11074152 . S2CID 20457228 . ^ Sauaia A, Moore FA, Moore EE, et al.
Current Opinion in Genetics & Development . 10 (3): 262–9. doi : 10.1016/s0959-437x(00)00084-8 . PMID 10826992 . ^ Rash BG, Grove EA (October 2007). ... Archived from the original on 2009-05-14. ^ Armand Marie Leroi , Mutants : On the Form, Varieties and Errors of the Human Body , 2003, Harper Perennial, London. ISBN 0-00-653164-4 ^ The Carter Center for Research in holoprosencephaly [1] and [2] Archived 2008-11-21 at the Wayback Machine ^ Hong M, Srivastava K, Kim S, Allen BL, Leahy DJ, Hu P, Roessler E, Krauss RS, Muenke M (2017) BOC is a modifier gene in holoprosencephaly. ... Human Genetics . 125 (1): 95–103. doi : 10.1007/s00439-008-0599-0 . PMC 2692056 . PMID 19057928 . ^ Tekendo-Ngongang C, Muenke M, Kruszka P (1993).
A number sign (#) is used with this entry because it represents a contiguous gene deletion syndrome. A form of holoprosencephaly (HPE10) has been mapped within the deleted region of chromosome 1q41-q42. For a general phenotypic description and a discussion of genetic heterogeneity of holoprosencephaly, see HPE1 (236100). See also congenital diaphragmatic hernia (DIH; 142340), which has been associated with deletion of chromosome 1q41-q42. See also Skraban-Deardorff syndrome (SKDEAS; 617616), caused by mutation in the WDR26 gene (617424) on chromosome 1q42, which shows overlapping features with chromosome 1q41-q42 deletion syndrome.
A number sign (#) is used with this entry because of evidence that holoprosencephaly-4 (HPE4) is caused by heterozygous mutation in the TGIF gene (602630) on chromosome 18p11. For phenotypic information and a general discussion of genetic heterogeneity in holoprosencephaly, see HPE1 (236100). Cytogenetics Johnson and Bachman (1976) described a normal female who appeared to have a nonreciprocal translocation from the short arm of one chromosome 18 to the long arm of a chromosome 12. She gave birth to a cebocephalic child whose karyotype included an 18p- chromosome. The association of loss of 18p with holoprosencephaly was suggested by the patient reported by Munke et al. (1988); cytogenetic and molecular studies indicated a Y/18 translocation with loss of 18p and distal Yq material in a holoprosencephalic fetus.
A number sign (#) is used with this entry because holoprosencephaly-11 (HPE11) is caused by heterozygous mutation in the CDON gene (608707) on chromosome 11q24. For a general phenotypic description and a discussion of genetic heterogeneity of holoprosencephaly, see HPE1 (236100). Clinical Features Bae et al. (2011) reported 4 unrelated patients with HPE11. One patient had agenesis of the corpus callosum, hypotelorism, growth hormone deficiency, global developmental delay, and thick eyebrows with synophrys. Another had agenesis of the corpus callosum, alobar HPE, hypotelorism, cleft lip/palate, and absent columella; absent pituitary and polysplenia were noted in this patient at autopsy.
For a phenotypic description and a discussion of genetic heterogeneity of holoprosencephaly, see HPE1 (236100). Clinical Features Levin and Surana (1991) described holoprosencephaly in association with an interstitial deletion of chromosome 14q11.1-q13. Parental karyotypes were normal. The white female, born to nonconsanguineous young parents after an uncomplicated pregnancy, showed hypotelorism, lack of nasal bridge, flattened nasal tip with no visible septum, wide midline cleft of lip and hard palate, and ptosis of the left upper eyelid. Axial CT scan of the head was interpreted as showing semilobar holoprosencephaly. The infant died at 8 days of age. Kamnasaran et al. (2005) reported 6 patients with HPE and interstitial deletions on proximal chromosome 14q: 1 had alobar HPE and 5 had lobar HPE.
For phenotypic information and a general discussion of genetic heterogeneity in holoprosencephaly (HPE), see HPE1 (236100). Clinical Features Lehman et al. (2001) described a female infant who survived for 5.5 hours after delivery at 33 weeks' gestation. Autopsy showed a lobar variant of holoprosencephaly. Cytogenetics By cytogenetic analysis in an infant with a lobar variant of holoprosencephaly, Lehman et al. (2001) identified a 2q37.1-q37.3 deletion. This case represented the fourth reported case of HPE associated with partial monosomy 2q37 and the first with an apparently isolated 2q37 deletion. Lehman et al. (2001) suggested that the deleted segment may contain yet another locus, here designated HPE6, which, when disrupted, can lead to brain malformations within the HPE spectrum.
Nonsyndromic holoprosencephaly is an abnormality of brain development that also affects the head and face. Normally, the brain divides into two halves (hemispheres ) during early development. Holoprosencephaly occurs when the brain fails to divide properly into the right and left hemispheres. This condition is called nonsyndromic to distinguish it from other types of holoprosencephaly caused by genetic syndromes, chromosome abnormalities, or substances that cause birth defects (teratogens). The severity of nonsyndromic holoprosencephaly varies widely among affected individuals, even within the same family.
Holoprosencephaly is an abnormality of brain development in which the brain doesn't properly divide into the right and left hemispheres. The condition can also affect development of the head and face. There are 4 types of holoprosencephaly, distinguished by severity. From most to least severe, the 4 types are alobar, semi-lobar, lobar, and middle interhemispheric variant (MIHV). In general, the severity of any facial defects corresponds to the severity of the brain defect. The most severely affected people have one central eye (cyclopia) and a tubular nasal structure (proboscis) located above the eye.
A number sign (#) is used with this entry because of evidence that holoprosencephaly-3 (HPE3) is caused by heterozygous mutation in the SHH gene (600725), which encodes the human Sonic hedgehog homolog, on chromosome 7q36. For a phenotypic description and a discussion of genetic heterogeneity of holoprosencephaly, see HPE1 (236100). Clinical Features Berry et al. (1984) and Johnson (1989) provided information on a family (family 2 in Johnson, 1989) in which holoprosencephaly occurred in 2 sibs and their first cousin, who were offspring of parents with a single central maxillary incisor. Johnson (1989) reported a second patient (family 1) with full-blown holoprosencephaly whose mother and sister had only a single central maxillary incisor. Johnson (1989) suggested that holoprosencephaly is a developmental field defect of which the mild forms can be single median incisor, hypotelorism, bifid uvula, or pituitary deficiency.
A number sign (#) is used with this entry because of evidence that holoprosencephaly-7 (HPE7) is caused by heterozygous mutation in the PTCH1 gene (601309) on chromosome 9q22. For phenotypic information and a general discussion of genetic heterogeneity in holoprosencephaly, see HPE1 (236100). Description Holoprosencephaly (HPE) is the most commonly occurring congenital structural forebrain anomaly in humans. HPE is associated with mental retardation and craniofacial malformations. Considerable heterogeneity in the genetic causes of HPE has been demonstrated (Ming et al., 2002).
A number sign (#) is used with this entry because of evidence that solitary median maxillary central incisor (SMMCI) and SMMCI syndrome are caused by heterozygous mutation in the Sonic hedgehog gene (SHH; 600725) on chromosome 7q36. Clinical Features Rappaport et al. (1976, 1977) reported 7 unrelated patients with single (unpaired) deciduous and permanent maxillary central incisors and short stature. Five of them had isolated growth hormone deficiency. The other 2 had normal growth hormone responses but were short of stature. No similar or possibly related abnormalities were present in the 7 families. Rappaport et al. (1976) used the term monosuperoincisivodontic dwarfism to describe the association of short stature and solitary incisor.
Description Holoprosencephaly (HPE) is the most common structural malformation of the human forebrain and occurs after failed or abbreviated midline cleavage of the developing brain during the third and fourth weeks of gestation. HPE occurs in up to 1 in 250 gestations, but only 1 in 8,000 live births (Lacbawan et al., 2009). Classically, 3 degrees of severity defined by the extent of brain malformation have been described. In the most severe form, 'alobar HPE,' there is a single ventricle and no interhemispheric fissure. The olfactory bulbs and tracts and the corpus callosum are typically absent.
A rare complex brain malformation characterized by incomplete cleavage of the prosencephalon, and affecting both the forebrain and face and resulting in neurological manifestations and facial anomalies of variable severity. Epidemiology Prevalence is estimated to be 1/10,000 live and still births and 1/250 conceptuses, with worldwide distribution. Clinical description Three classical forms of holoprosencephaly (HPE) of increasing severity are described based on the degree of anatomical separation: lobar, semi-lobar and alobar HPE. Milder subtypes include midline interhemispheric variant and septopreoptic HPE. There is, however, a continuous spectrum of abnormal separation of the hemispheres that extends from aprosencephaly/atelencephaly, the most severe end of the spectrum, to microform HPE, a less severe midline defect without the typical HPE brain characteristics.
Waterhouse et al. [3] recommend: Time zones Local time to avoid light at destination Local time to seek light at destination East 6h 03:00–09:00 11:00–17:00 East 7h 04:00–10:00 12:00–18:00 East 8h 05:00–11:00 13:00–19:00 East 9h 06:00–12:00 14:00–20:00 Travelling east by 10 hours or more is usually best managed by assuming it is a 14-hour westward transition and delaying the body clock. [3] A customised jet lag program can be obtained from an online jet lag calculator.
Kearney, of Marshall Avenue, Mattoon, reported smelling a strong, sweet odor around 11:00 pm. At first she dismissed the smell, believing it to be from flowers outside of the window, but the odor soon became stronger and she began to lose feeling in her legs. ... 347 Strange Sightings, Incredible Occurrences, and Puzzling Physical Phenomena . Detroit: Visible Ink Press. ISBN 0-8103-9436-7 . ^ a b "At Night in Mattoon" . ... Borderlands: The ultimate exploration of the unknown . Overlook. ISBN 0-87951-724-7 . ^ Janet, Pierre (1965). ... Detroit: Visible Ink Press. pp. 239 . ISBN 0-8103-9436-7 . ^ Do Go On. "146 - The Mad Gasser of Mattoon" . ... Jacksonville, Ill.: Swamp Gas Book Co. ISBN 978-0-9728605-0-5 . Van Huss, William B. (2017) The Mad Gasser of Botetourt County ISBN 978-1979589246 External links [ edit ] "The Mad Gasser of Mattoon: how the press created an imaginary chemical weapons attack" from Skeptical Inquirer , 7/1/2002 Site with newspaper headlines and a list of victims and locations of incidents
Trends in Cognitive Sciences . 5 (1): 36–41. doi : 10.1016/S1364-6613(00)01571-0 . PMID 11164734 . S2CID 15092606 . ^ a b Jäncke, Lutz; Beeli, Gian; Eulig, Cornelia; Hänggi, Jürgen (March 2009). ... Sagiv, ed., Synesthesia: Perspectives from Cognitive Neuroscience , Oxford: Oxford University Press , ISBN 0-19-516623-X , pp. 11–33 ^ a b Simner, J.; Ward, J.; Lanz, M.; Jansari, A.; Noonan, K.; Glover, L.; Oakley, D.A. (2005). ... Handbook of Multisensory Processes. Cambridge, MA: MIT Press. ISBN 0-262-03321-6 ^ Steen, Carol. "Quote from Carol Steen Artist and founding member of the American Synesthesia Association in an interview at the Massachusetts Institute of Technology" . ... Ninth IEEE International Symposium on Wearable Computers . pp. 108–113. doi : 10.1109/ISWC.2005.11 . ISBN 0-7695-2419-2 . S2CID 8221450 . Archived from the original (PDF) on 2007-03-29.
A number sign (#) is used with this entry because of evidence that Axenfeld-Rieger syndrome type 1 (RIEG1) is caused by heterozygous mutation in the homeobox transcription factor gene PITX2 (601542) on chromosome 4q25. Description Axenfeld-Rieger syndrome is an autosomal dominant disorder of morphogenesis that results in abnormal development of the anterior segment of the eye, and results in blindness from glaucoma in approximately 50% of affected individuals (Fitch and Kaback, 1978). Systemic anomalies are associated, including dental hypoplasia, failure of involution of periumbilical skin, and maxillary hypoplasia (Alkemade, 1969). Genetic Heterogeneity of Axenfeld-Rieger Syndrome Linkage studies indicate that a second type of Axenfeld-Rieger syndrome maps to chromosome 13q14 (RIEG2; 601499). A third form of Axenfeld-Rieger syndrome (RIEG3; 602482) is caused by mutation in the FOXC1 gene (601090) on chromosome 6p25.
Axenfeld-Rieger syndrome (ARS) is a generic term used to designate overlapping genetic disorders, in which the major physical condition is anterior segment dysgenesis of the eye. Patients with ARS may also present with multiple variable congenital anomalies. Epidemiology The syndrome has an estimated prevalence of 1/200,000. Clinical description The clinical manifestations of ARS are highly variable. Features can be divided into ocular and non-ocular findings. Ocular abnormalities mainly affect the iris: hypoplasia, corectopia or hole formation in the iris mimicking polycoria; cornea: prominent and anteriorly displaced Schwalbe's line (posterior embryotoxon); and the chamber angle: iris strands bridging the iridocorneal angle to the trabecular meshwork. Eye dysgenesis in ARS may cause increased ocular pressure (IOP) leading to glaucoma.
Axenfeld-Rieger syndrome is a group of disorders that mainly affects the development of the eye. Common eye symptoms include cornea defects and iris defects. People with this syndrome may have an off-center pupil (corectopia) or extra holes in the eyes that can look like multiple pupils (polycoria). About 50% of people with this syndrome develop glaucoma, a condition that increases pressure inside of the eye, and may cause vision loss or blindness. Click here to view a diagram of the eye. Even though Axenfeld-Rieger syndrome is primarily an eye disorder, this syndrome can affect other parts of the body. Most people with this syndrome have distinctive facial features and many have issues with their teeth, including unusually small teeth (microdontia) or fewer than normal teeth (oligodontia).
Description Axenfeld-Rieger syndrome is a disorder of morphogenesis that results in abnormal development of the anterior segment of the eye, which results in blindness from glaucoma in approximately 50% of affected individuals. Systemic abnormalities, including cardiac and dental anomalies, are associated. For a general phenotypic description and a discussion of genetic heterogeneity and nomenclature of Axenfeld-Rieger syndrome, see RIEG1 (180500). Mapping Deletion of 13q14 was described in 2 cases of Rieger syndrome (Akazawa et al., 1981; Stathacopoulos et al., 1987). Phillips et al. (1996) performed linkage analysis of a large 4-generation family and demonstrated that Rieger syndrome was not linked to 4q25 but to markers on 13q14.
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