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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.
The chalky grayish-white particles within the tumor mass correspond to foci of cartilage on histology; the semi-translucent membrane covering the lens in some tumors corresponds to spreading neoplastic cells. [4] [6] Tumor cells form a characteristic diktyomatous pattern, with folded cords and sheets resembling a fisherman's net. [3] In early development of the retina, the medullary epithelial cells acquire polarity, such that a basement membrane associated with the vitreous forms the internal limiting membrane on one side, while terminal bars form the outer limiting membrane on the other side. ... Mortality may occur in patients with extraocular extension to the brain. [1] [4] [6] Lack of glial differentiation, as demonstrated by negative staining for glial fibrillary acidic protein (GFAP), may confer a favourable prognosis. [11] Epidemiology [ edit ] Mean age at diagnosis is 5 years. [1] [2] While most cases occur in young children, adult cases have been reported. [1] [9] Incidence is similar in male and female and among different races. ... American Journal of Ophthalmology . 130 (3): 364–366. doi : 10.1016/S0002-9394(00)00542-0 . ^ a b c d e Vajaranant, Thasarat S.; Mafee, Mahmood F.; Kapur, Rashmi; Rapoport, Mark; Edward, Deepak P. ... "The Role of Magnetic Resonance Imaging in Children with Intraocular Tumors and Simulating Lesions". Ophthalmology . 103 (11): 1774–1783. doi : 10.1016/S0161-6420(96)30428-4 . ^ a b FontR, Croxatto J, Rao N. ... American Journal of Ophthalmology . 133 (6): 841–843. doi : 10.1016/S0002-9394(02)01432-0 . ^ Janss, Anna J.; Yachnis, Anthony T.; Silber, Jeffrey H.; Trojanowski, John Q.; Lee, Virginia M.
Medulloepithelioma of the central nervous system is a rare, primitive neuroectodermal tumor characterized by papillary, tubular and trabecular arrangements of neoplastic neuroepithelium, mimicking the embryonic neural tube, most commonly found in the periventricular region within the cerebral hemispheres, but has also been reported in brainstem and cerebellum. It usually presents in childhood with headache, nausea, vomiting, facial nerve paresis, and/or cerebellar ataxia, and typically has a progressive course, highly malignant behavior and poor prognosis. Hearing and visual loss have also been observed.
Histologically, medulloepithelioma resemble a primitive neural tube and with neuronal, glial and mesenchymal elements. [8] [9] Flexner-Wintersteiner rosettes may also be observed. [10] Immunohistochemically , neural tube-like structures are vimentin positive in the majority of medulloepitheliomas. [11] Poorly differentiated medulloepitheliomas are vimentin negative.
. ^ "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 .
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. ... In 2006, Granada's town hall designated an area of 9,500 sq. m. around the area of Huerta del Rasillo that is capable of hosting 20,000 people at a time. [11] In response to botellódromo, the youth have proposed an alternative solution to the botellón issue, suggesting bars and clubs lower drink prices and entrance fees, as well as other night activities such as sporting events, cultural festivities and other activities. [12] Macro-botellón [ edit ] A macro-botellón is a large and usually pre-planned botellón. One example of a macro-botellón was on 17 March 2006, "Half of Spain [met] on the net to organize a macro-botellón". [13] The macro-botellón was organized in cities around Spain, such as Madrid, Barcelona, Sevilla, Oviedo, Murcia, Vitoria, Málaga, Córdoba, Granada, and Jaén. [14] One of the purposes of the macro-botellón on 17 March 2006, near the Faro de Moncloa in Madrid, Spain, was to protest against the municipal restrictions on drinking alcohol in the streets. ... 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.
In the 29 patients followed by Iwatuski et al., 11 of the 18 with definite or probable HV were available for follow-up and all were alive without progression of their symptoms. Some had recurrent eruptions of HV. In contrast out of 11 severe patients in this study, 6 had evidence of chronic EBV infection, 5 had hypersensitivity to mosquito bites, 4 had virus-associated hemophagocytic syndrome . 6 of the severe group had natural killer-cell lymphocytosis in the peripheral blood. [6] Diagnosis [ edit ] Histology of the affected area commonly shows dense perivascular lymphocytic infiltration with reticulated degeneration of the epidermis. ... Feb, 42(2 Pt 1) (2): 208–13. doi : 10.1016/s0190-9622(00)90127-0 . PMID 10642674 . ^ James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology . Saunders Elsevier. ISBN 0-7216-2921-0 . ^ Rezk SA, Zhao X, Weiss LM (September 2018).
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.
In Dogger Bank itch, sensitivity is acquired after repeated handling of the sea chervils that become entangled in fishing nets. [ citation needed ] The specific toxin responsible for the rash was determined to be the sulfur -bearing salt (2-hydroxyethyl) dimethylsulfoxonium chloride. [3] This salt is also found in some sea sponges and has potent in vitro activity against leukemia cells. [4] Treatment [ edit ] A study of two cases in 2001 suggests that the rash responds to oral ciclosporin . ... The sea chervil, abundant in the area, frequently came up with the fishing nets and had to be thrown back into the water. ... Andrews' Diseases of the Skin: clinical Dermatology . Saunders Elsevier. ISBN 978-0-7216-2921-6 . ^ Bonnevie, P. (1948). ... Comparative Biochemistry and Physiology B . 128 (1): 27–30. doi : 10.1016/S1096-4959(00)00316-X . CS1 maint: multiple names: authors list ( link ) ^ a b Bowers PW, Julian CG., PW; Julian, CG (2001).
This form of pharmacophobia can be treated by attempting to convince the patient to take test doses of the drug or another drug in the same drug class to prove to the patient that the symptoms were not due to the drug but due to the illness the drug was taken to treat. [11] See also [ edit ] List of phobias References [ edit ] ^ Bossini, L.; Martinucci, M.; Paolini, K.; Castrogiovanni, P. ... 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). "Cervical polyps" . MEDLINE . Retrieved 2007-11-05 . ^ a b c Bates, Jane (1997). Practical Gynaecological Ultrasound . 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) .
"Lymphatic Filariasis" . Archived from the original on 11 May 2012 . Retrieved 24 March 2012 . ^ Niwa S. ... Archived from the original on 15 February 2015 . Retrieved 11 February 2015 . ^ a b "Lymphatic filariasis. ... Archived (PDF) from the original on 2016-03-04 . Retrieved 2015-11-28 . ^ a b c d e f The Carter Center. ... Wallingford: CAB International. pp. 1–848. ISBN 0-85198-689-7 . ^ Grove, David I (2014). ... Oxford: Oxford University Press. pp. 1–602. ISBN 978-0-19-964102-4 . ^ Burma D.P. (2010).
Lymphatic filariasis is a parasitic disease caused by microscopic, thread-like worms that only live in the human lymph system , which maintains the body's fluid balance and fights infections. It is spread from person to person by mosquitoes. Most infected people are asymptomatic and never develop clinical symptoms. A small percentage of people develop lymphedema , which may affect the legs, arms, breasts, and genitalia; bacterial infections that cause hardening and thickening of the skin, called elephantiasis; hydrocele (swelling of the scrotum) in men; and pulmonary tropical eosinophilia syndrome . Treatment may include a yearly dose of medicine, called diethylcarbamazine (DEC); while this drug does not kill all of the adult worms, it prevents infected people from giving the disease to someone else.
Lymphatic filariasis (LF) is a severe form of filariasis (see this term), caused by the parasitic worms Wuchereria bancrofti , Brugia malayi and Brugia timori , and the most common cause of acquired lymphedema worldwide. LF is endemic to tropical and subtropical regions. The vast majority of infected patients are asymptomatic but it can also cause a variety of clinical manifestations, including limb lymphedema, genital anomalies (hydrocele, chylocele), elephantiasis in later stages of the disease (frequently in the lower extremities), and tropical pulmonary eosinophilia (nocturnal paroxysmal cough and wheezing, weight loss, low-grade fever, adenopathy, and pronounced blood eosinophilia). Renal involvement (hematuria, proteinuria, nephritic syndrome, glomerulonephritis), and mono-arthritis of the knee or ankle joint have also been reported.
They are due to elevated cytosolic calcium concentrations, classically seen with digoxin toxicity. [3] [4] The overload of the sarcoplasmic reticulum may cause spontaneous Ca 2+ release after repolarization, causing the released Ca 2+ to exit the cell through the 3Na + /Ca 2+ -exchanger. This results in a net depolarizing current. The classical feature is Bidirectional ventricular tachycardia . ... Neuroscience. ^ Katzung, B: Basic and Clinical Pharmacology (10th ed.), chapter 14: "Agents Used in Cardiac Arrhythmias", The McGraw-Hill Companies, 2007, ISBN 978-0-07-145153-6 ^ Lilly, L: "Pathophysiology of Heart Disease", chapter 11: "Mechanisms of Cardiac Arrhthmias", Lippencott, Williams and Wilkens, 2007 This article about a medical condition affecting the circulatory system is a stub .
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.
Few studies have specifically focused on guttate psoriasis management, so there are currently no firm guidelines for managing guttate psoriasis differently from plaque psoriasis . [10] [11] Immunosuppressive drugs that inhibit T cell activation have been effective in treating severe cases of chronic guttate psoriasis. [12] Due to the role streptococcal infection plays in the development of guttate psoriasis, systemic antibiotics have been considered as a potential treatment option. ... 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). ... "Perianal streptococcal dermatitis associated with guttate psoriasis and/or balanoposthitis: a study of five cases". Pediatric Dermatology . 11 (2): 168–71. doi : 10.1111/j.1525-1470.1994.tb00574.x . ... 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.
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. ... Archived from the original on 2007-09-27 . Retrieved 2006-11-01 . ^ a b "Victims of gas prowler now 25" . ... Time Magazine . 1944-09-18. 0040-781X . Retrieved 2006-11-01 . ^ a b c d e f g Taylor, Troy (2002). ... Daily Journal-Gazette (Mattoon) . 1944-09-11. Archived from the original on 2007-09-27 . Retrieved 2006-11-01 . ^ a b c d "Police get two false alarms during night" .
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.
Medical-dictionary.thefreedictionary.com . Retrieved 2015-11-01 . ^ Bhave G, Neilson EG (August 2011). ... Jones & Bartlett Publishers. pp. 471–. ISBN 978-0-323-08533-5 . ^ Assuma Beevi (31 August 2012). ... Jaypee Brothers Publishers. pp. 113–. ISBN 978-93-5025-987-0 . ^ Blaber A, Harris G (1 October 2011). ... Resuscitation . 45 (3): 209–220. doi : 10.1016/s0300-9572(00)00183-0 . PMID 10959021 . ^ "Permissive Hypotension" . ... Archived from the original on 2013-11-27 . Retrieved 2015-11-01 . ^ Kennamer M, American Academy of Orthopaedic Surgeons (AAOS) (30 September 2013).
Human African Trypanosomiasis (HAT), also called sleeping sickness, is a vector-borne parasitic disease caused by a protozoa of the Trypanosoma genus transmitted by the bite of a tsetse fly (genus Glossina ), that is found under its chronic form (average duration of 3 years) in western and central Africa (in case of the T. brucei gambiense sub-species), and under its acute form (lasting from few weeks to 6 months) in eastern and southern Africa (in case of the T. brucei rhodesiense sub-species). HAT comprises an initial hemo-lymphatic stage characterized by fever, weakness, musculoskeletal pain, anemia, and lymphadenopathy, along with dermatologic, cardiac and endocrine complications or hepatosplenomegaly, followed by a meningo-encephalitic stage characterized by neurologic involvement (sleep disturbances, psychiatric disorders, seizures) that progresses, in the absence of treatment, towards a fatal meningoencephalitis.
Independently, the father was found to have an atrial septal defect at 11 months of age, which eventually required surgical repair. ... Mapping Gould et al. (1997) performed linkage analysis in a 4-generation family segregating Axenfeld-Rieger anomaly, later found to segregate Axenfeld-Rieger syndrome (Mears et al., 1998), and obtained a maximum lod score of 3.1 (theta = 0) at marker D6S344 on chromosome 6p25.
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).
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. In this kindred 11 affected and 16 unaffected members were examined.
