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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).
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" .
. ^ "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.
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).
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.
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?
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).
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).
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.
A number sign (#) is used with this entry because cerebral amyloid angiopathy (CAA) can be caused by mutation in the gene encoding the amyloid precursor protein (APP; 104760). Mutations in the APP gene can also cause autosomal dominant Alzheimer disease-1 (AD1; 104300), which shows overlapping clinical and neuropathologic features. ... Revesz et al. (2003) reviewed the pathology and genetics of APP-related CAA and discussed the different neuropathologic consequences of different APP mutations. ... In 4 affected members of an Italian family with cerebral amyloid angiopathy, Obici et al. (2005) identified a mutation in the APP gene (104760.0019). In 2 brothers from an extensive Iowa kindred with progressive dementia and cerebroarterial amyloidosis, Grabowski et al. (2001) identified a heterozygous mutation in the APP gene (N694D; 104760.0016). ... Human APP mRNA was detected in neurons and neuronal processes, but not in vessel walls. ... Herzig et al. (2006) extended their earlier studies by developing several murine models of APP-related CAA and APP-related parenchymal amyloid deposition.
Etiology HCHWA-D is due to a mutation in the APP gene on chromosome 21q21.2, encoding the beta-amyloid precursor protein. ... Genetic testing reveals a mutation in the APP gene. Differential diagnosis Differential diagnoses include other conditions that could cause intracerebral hemorrhage such as coagulopathies, vasculitis (see these terms), CNS neoplasms, cerebral vascular malformations, ischemic stroke and antecedent trauma.
The Dutch type is the most common, with over 200 affected individuals reported in the scientific literature. Causes Mutations in the APP gene are the most common cause of hereditary cerebral amyloid angiopathy. APP gene mutations cause the Dutch, Italian, Arctic, Iowa, Flemish, and Piedmont types of this condition. ... Familial British and Danish dementia are caused by mutations in the ITM2B gene. The APP gene provides instructions for making a protein called amyloid precursor protein. ... Additionally, the ITM2B protein may be involved in processing the amyloid precursor protein. Mutations in the APP , CST3 , or ITM2B gene lead to the production of proteins that are less stable than normal and that tend to cluster together (aggregate). ... Learn more about the genes associated with Hereditary cerebral amyloid angiopathy APP CST3 ITM2B Inheritance Pattern Hereditary cerebral amyloid angiopathy caused by mutations in the APP , CST3 , or ITM2B gene is inherited in an autosomal dominant pattern , which means one copy of the altered gene in each cell is sufficient to cause the disorder.
The authors discussed the abnormalities of APP processing, the role of abnormal intracellular protein folding, oxidative stress, and the potential role of cholesterol in the pathogenic cascade of IBM. ... Accumulation of the amyloid-beta peptide, which is derived from proteolysis of the larger beta-APP, seems to be an early pathologic event in both Alzheimer disease and IBM; in the latter, it occurs predominantly intracellularly within affected myofibers. To elucidate the possible role of beta-APP mismetabolism in the pathogenesis of IBM, Sugarman et al. (2002) selectively targeted beta-APP overexpression to skeletal muscle in transgenic mice, using the muscle creatine kinase promoter. They reported that older (more than 10 months) transgenic mice exhibited intracellular immunoreactivity to beta-APP and its proteolytic derivatives in skeletal muscle. In this transgenic model, selective overexpression of beta-APP led to the development of a subset of other histopathologic and clinical features characteristic of IBM, including centric nuclei, inflammation, and deficiencies in motor performance.
Inclusion body myositis (IBM) is a slowly progressive degenerative inflammatory disorder of skeletal muscles characterized by late onset weakness of specific muscles and distinctive histopathological features. Epidemiology IBM has a highly variable prevalence according to geographic, ethnic and age criteria. Prevalence in the general population ranges from 1:1,000,000 to 1:14,000 but a three-fold increase is observed when considering only a population over 50 years. Underdiagnosis may be an explanation for the high ethno-geographic variation. Male-to-female ratio is 2:1 on average (0.5 to 6.5:1). Clinical description IBM onset is over 50 years but may also occur earlier, in the 5th decade.
Inflammatory muscle disease in older adults This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. Find sources: "Inclusion body myositis" – news · newspapers · books · scholar · JSTOR ( September 2009 ) ( Learn how and when to remove this template message ) Inclusion body myositis Other names sIBM Specialty Rheumatology Inclusion body myositis ( IBM ) ( / m aɪ oʊ ˈ s aɪ t ɪ s / ) (sometimes called sporadic inclusion body myositis , sIBM ) is the most common inflammatory muscle disease in older adults. [1] The disease is characterized by slowly progressive weakness and wasting of both proximal muscles (closest to the body's midline) and distal muscles (the limbs), most apparent in the finger flexors and knee extensors . [2] IBM is often confused with an entirely different class of diseases, called hereditary inclusion body myopathies (hIBM). [3] [4] The "M" in hIBM is an abbreviation for "myopathy" while the "M" in IBM is an abbreviation for "myositis". These diseases should not be confused with each other. In IBM, two processes appear to occur in the muscles in parallel, one autoimmune and the other degenerative. Inflammation is evident from the invasion of muscle fibers by immune cells .
Idiopathic inflammatory myopathy is a group of disorders characterized by inflammation of the muscles used for movement (skeletal muscles). Idiopathic inflammatory myopathy usually appears in adults between ages 40 and 60 or in children between ages 5 and 15, though it can occur at any age. The primary symptom of idiopathic inflammatory myopathy is muscle weakness, which develops gradually over a period of weeks to months or even years. Other symptoms include joint pain and general tiredness (fatigue). There are several forms of idiopathic inflammatory myopathy, including polymyositis, dermatomyositis, and sporadic inclusion body myositis. Polymyositis and dermatomyositis involve weakness of the muscles closest to the center of the body (proximal muscles), such as the muscles of the hips and thighs, upper arms, and neck.
Inclusion body myositis (IBM) is a progressive muscle disorder characterized by muscle inflammation, weakness, and atrophy (wasting). It is a type of inflammatory myopathy . IBM develops in adulthood, usually after age 50. The symptoms and rate of progression vary from person to person. The most common symptoms include progressive weakness of the legs, arms, fingers, and wrists. Some people also have weakness of the facial muscles (especially muscles controlling eye closure), or difficulty swallowing (dysphagia). Muscle cramping and pain are uncommon, but have been reported in some people.
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