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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.
Andrews' Diseases of the Skin: clinical Dermatology . Saunders Elsevier. ISBN 978-0-7216-2921-6 . ^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). ... ISBN 978-1-4160-2999-1 . v t e Amyloidosis Common amyloid forming proteins AA ATTR Aβ2M AL Aβ / APP AIAPP ACal APro AANF ACys ABri Systemic amyloidosis AL amyloidosis AA amyloidosis Aβ2M/Haemodialysis-associated AGel/Finnish type AA/Familial Mediterranean fever ATTR/Transthyretin-related hereditary Organ-limited amyloidosis Heart AANF/Isolated atrial Brain Familial amyloid neuropathy ACys+ABri/Cerebral amyloid angiopathy Aβ/Alzheimer's disease Kidney AApoA1+AFib+ALys/Familial renal Skin Primary cutaneous amyloidosis Amyloid purpura Endocrine Thyroid ACal/Medullary thyroid cancer Pituitary APro/Prolactinoma Pancreas AIAPP/Insulinoma AIAPP/Diabetes mellitus type 2 This cutaneous condition article is a stub .
Hereditary amyloidosis refers to a group of inherited conditions that make up one of the subtypes of amyloidosis . Hereditary amyloidosis is characterized by the deposit of an abnormal protein called amyloid in multiple organs of the body where it should not be, which causes disruption of organ tissue structure and function. In hereditary amyloidosis, amyloid deposits most often occur in tissues of the heart, kidneys, and nervous system. While symptoms of hereditary amyloidosis may appear in childhood, most individuals do not experience symptoms until adulthood. There are many types of hereditary amyloidosis associated with different gene mutations and abnormal proteins.
Andrews' Diseases of the Skin: clinical Dermatology . Saunders Elsevier. ISBN 978-0-7216-2921-6 . ^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). ... ISBN 978-1-4160-2999-1 . v t e Amyloidosis Common amyloid forming proteins AA ATTR Aβ2M AL Aβ / APP AIAPP ACal APro AANF ACys ABri Systemic amyloidosis AL amyloidosis AA amyloidosis Aβ2M/Haemodialysis-associated AGel/Finnish type AA/Familial Mediterranean fever ATTR/Transthyretin-related hereditary Organ-limited amyloidosis Heart AANF/Isolated atrial Brain Familial amyloid neuropathy ACys+ABri/Cerebral amyloid angiopathy Aβ/Alzheimer's disease Kidney AApoA1+AFib+ALys/Familial renal Skin Primary cutaneous amyloidosis Amyloid purpura Endocrine Thyroid ACal/Medullary thyroid cancer Pituitary APro/Prolactinoma Pancreas AIAPP/Insulinoma AIAPP/Diabetes mellitus type 2 This cutaneous condition article is a stub .
Andrews' Diseases of the Skin: clinical Dermatology . Saunders Elsevier. ISBN 978-0-7216-2921-6 . ^ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). ... ISBN 978-1-4160-2999-1 . v t e Amyloidosis Common amyloid forming proteins AA ATTR Aβ2M AL Aβ / APP AIAPP ACal APro AANF ACys ABri Systemic amyloidosis AL amyloidosis AA amyloidosis Aβ2M/Haemodialysis-associated AGel/Finnish type AA/Familial Mediterranean fever ATTR/Transthyretin-related hereditary Organ-limited amyloidosis Heart AANF/Isolated atrial Brain Familial amyloid neuropathy ACys+ABri/Cerebral amyloid angiopathy Aβ/Alzheimer's disease Kidney AApoA1+AFib+ALys/Familial renal Skin Primary cutaneous amyloidosis Amyloid purpura Endocrine Thyroid ACal/Medullary thyroid cancer Pituitary APro/Prolactinoma Pancreas AIAPP/Insulinoma AIAPP/Diabetes mellitus type 2 This cutaneous condition article is a stub .
The recommendations are: For children in age less than one year: 30 minute physical activity, 0 hours screen time and 14 – 17 hours of sleep time per day. For children in age 1 year: 180 minutes physical activity, 0 hours screen time, 11–14 hours of sleep time per day. ... In Android a similar feature called "digital wellbeing" has been implemented to keep track of cell phone usage. [85] These apps usually work by doing one of two things: increasing awareness by sending user usage summaries, or notifying the user when he/she has exceeded some user-defined time-limit for each app or app category. ... The researchers implement an Android app that combined these three intervention types and found that users reduced their time with the apps they feel are a poor use of time by 21% while their use of the apps they feel are a good use of time remained unchanged. [86] AppDetox allows users to define rules that limit their usage of specific apps. [87] PreventDark detects and prevents problematic usage of smartphones in the dark. [88] Using vibrations instead of notifications to limit app usage has also been found to be effective. [89] Further, researchers have found group-based interventions that rely on users sharing their limiting behaviors with others to be effective. [90] Bans on mobile phone use [ edit ] See also: Mobile phone use in schools In some places in the world the use of mobile phones was banned in classes during instructional time, for example, in France , Ontario . ... Yale University Press. ISBN 978-0-300-19621-4 . ^ Chan, Nee Nee; Walker, Caroline; Gleaves, Alan (1 March 2015).
. ^ "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 .
Discovering Psychology . Worth Publishers. ISBN 0-7167-5704-4 . [ page needed ] ^ Fried, Yehuda; Joseph Agassi (1976). ... Needham Heights, MA, USA: Allyn & Bacon. ISBN 0-205-14164-1 . Das, J.P. (2002). A better look at intelligence. ... Cambridge: Cambridge University Press. pp. 445–476. ISBN 978-0-521-59648-0 . Lay summary (22 July 2013). ... Essentials of Psychological Testing . John Wiley & Sons. ISBN 978-0-471-41978-5 . Lay summary (10 October 2013). ... Cambridge: Cambridge University Press. pp. 20–38. ISBN 978-0-521-73911-5 . Lay summary (9 February 2012).
This loss of brain volume affects ones ability to live and function properly, ultimately being fatal. [5] Beta-amyloid is a small piece of a larger protein called the amyloid precursor protein (APP). Once APP is activated, it is cut into smaller sections of other proteins. ... Alpha-secretase cleavage of APP, which precludes the production of Aβ, is the most common processing event for APP. 21 allelic mutations have been discovered in the APP gene. These guarantee onset of early-onset familial Alzheimer disease and all occur in the region of the APP gene that encodes the Aβ domain. ... "A pathogenic mutation for probable Alzheimer's disease in the APP gene at the N-terminus of beta-amyloid". ... PMID 16817891 . ^ Chow VW, Mattson MP, Wong PC, Gleichmann M (March 2010). "An overview of APP processing enzymes and products" .
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).
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.
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) .
Cutaneous amyloidosis refers to a variety of skin diseases characterized histologically by the extracellular accumulation of amyloid deposits in the dermis. Rare forms include lichen amyloidosus, X-linked reticulate pigmentary disorder, primary localized cutaneous nodular amyloidosis, and macular amyloidosis (see these terms).
Lichen amyloidosis is a rare chronic form of cutaneous amyloidosis (see this term), a skin disease characterized by the accumulation of amyloid deposits in the dermis, clinically characterized by the development of pruritic, often pigmented, hyperkeratotic papules on trunk and extremities, especially on the shins, and histologically by the deposition of amyloid or amyloid-like proteins in the papillary dermis.
Primary cutaneous amyloidosis is a form of amyloidosis , a group of conditions in which an abnormal protein (called amyloid) builds up in various organs and tissues throughout the body. In primary cutaneous amyloidosis, specifically, this protein accumulates in the skin. There are three main forms of primary cutaneous amyloidosis: Lichen amyloidosis - multiple itchy, raised spots which are scaly and red/brown in color. This rash generally affects the shins, thighs, feet and forearms. Macular amyloidosis - mild to severely itchy, flat, dusky-brown or greyish colored spots that may come together to form patches of darkened skin. This rash generally appears on the upper back between the shoulder blades, the chest and less commonly, the arms.
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).
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.
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?
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.
Philadelphia, PA: Elsevier/Mosby. p. Chapter A. ISBN 978-0-323-07699-9 . ^ a b Maconachie GD, Gottlob I (December 2015). ... Philadelphia: Lippincott Williams & Wilkins. p. 110. ISBN 978-0-7817-3539-1 . ^ Levi DM (November 2013). ... New York, New York: Springer . ISBN 978-0-387-27924-4 . ^ Levi DM (March 2006). ... Ophthalmology . 108 (1): 163–71. doi : 10.1016/s0161-6420(00)00425-5 . PMID 11150283 . ^ Simon JW, Kaw P (August 2001). ... BMJ . 324 (7353): 1549. doi : 10.1136/bmj.324.7353.1549 . PMC 116606 . PMID 12089090 . ^ "App auf Rezept: Barmer bezahlt internetbasierte Behandlung" [Prescription app: Barmer pays for internet-based treatment]. www.aerztezeitung.de (in German). 28 March 2014.
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.
