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Medical genetics. Named after. Donovan James McCune. Fuller Albright. McCune–Albright syndrome is a complex genetic disorder affecting the bone, skin and endocrine systems. It is a mosaic disease arising from somatic activating mutations in GNAS, which encodes the alpha-subunit of the G s heterotrimeric G protein. [ 1]
Hyperpigmentation can be diffuse or focal, affecting such areas as the face and the back of the hands. Melanin is produced by melanocytes at the lower layer of the epidermis. Melanin is a class of pigment responsible for producing color in the body in places such as the eyes, skin, and hair. The process of melanin synthesis (melanogenesis ...
Postinflammatory hyperpigmentation ( PIH) is a skin condition characterized by the darkening of the skin ( hyperpigmentation) following an inflammatory injury, such as acne, dermatitis, infectious disease, or trauma. Less frequently, it may occur as a complication of a medical procedure performed on the skin.
Scarlet fever. Scarlet fever, also known as scarlatina, is an infectious disease caused by Streptococcus pyogenes, a Group A streptococcus (GAS). [ 3] It most commonly affects children between five and 15 years of age. [ 1] The signs and symptoms include a sore throat, fever, headache, swollen lymph nodes, and a characteristic rash. [ 1]
Noonan syndrome with multiple lentigines ( NSML) which is part of a group called Ras / MAPK pathway syndromes, [2] is a rare autosomal dominant, [3] multisystem disease caused by a mutation in the protein tyrosine phosphatase, non-receptor type 11 gene ( PTPN11 ). The disease is a complex of features, mostly involving the skin, skeletal and ...
Xeroderma pigmentosum ( XP) is a genetic disorder in which there is a decreased ability to repair DNA damage such as that caused by ultraviolet (UV) light. [ 1] Symptoms may include a severe sunburn after only a few minutes in the sun, freckling in sun-exposed areas, dry skin and changes in skin pigmentation. [ 1]
Melasma. Melasma (also known as chloasma faciei, [ 1]: 854 or the mask of pregnancy[ 2] when present in pregnant women) is a tan or dark skin discoloration. Melasma is thought to be caused by sun exposure, genetic predisposition, hormone changes, and skin irritation. [ 3]
Cellulite caused by repetitive piercing of skin through intravenous injections. Scabs on the skin. Dark spots on the face and body. Serious tooth decay. Read more on the physical side effects of ...
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