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Acanthosis nigricans is a medical sign characterised by brown-to-black, poorly defined, velvety hyperpigmentation of the skin. [1] It is usually found in body folds, [ 2 ] such as the posterior and lateral folds of the neck , the armpits , groin , navel , forehead and other areas.
Several features distinguish Crouzonodermoskeletal syndrome from Crouzon syndrome. People with Crouzonodermoskeletal syndrome have acanthosis nigricans, a skin condition characterized by thick, dark, velvety skin in body folds and creases, including the neck and underarms. In addition, subtle changes may be seen in the bones of the spine
Beare–Stevenson cutis gyrata syndrome is a rare genetic disorder characterized by craniosynostosis (premature fusion of certain bones of the skull, sometimes resulting in a characteristic 'cloverleaf skull'; further growth of the skull is prevented, and therefore the shape of the head and face is abnormal) and a specific skin abnormality, called cutis gyrata, characterized by a furrowed and ...
Other symptoms to note: Acne is the most common skin condition affecting Americans, Dr. Zeichner says, so you likely have experience with pimples already. The causes vary, but are often rooted in ...
Skin signs and symptoms in Noonan syndrome include lymphedema (lymph swelling of the extremities), keloid formation, excessive scar formation, hyperkeratosis (overdevelopment of outer skin layer), pigmented nevi (darkly pigmented skin spots), and connective tissue disease.
Symptoms that suggest a difference in connective tissue structure Unusually soft or velvety skin; Mild skin hyperextensibility; Unexplained striae distensae or rubae at the back, groins, thighs, breasts, and/or abdomen in adolescents, men, or pre-pubertal women without a history of significant gain or loss of body fat or weight
Fiddler's neck is an occupational disease that affects violin and viola players. [ 1 ] It is a cutaneous condition usually characterized by redness, thickening, and inflammation on the left side of the neck below the angle of the jaw where the instrument is held. [ 1 ]
In a study from Switzerland, Grover's disease was diagnosed in just 24 of more than 30,000 skin biopsies. [4] Grover's disease is mainly seen in males over the age of forty. [13] Grover's disease affects chiefly white adults in the fifth decade or later, and appears to be around 1.6 to 2.1 times more common in men than in women.