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Medical genetics. Hair diseases are illnesses that impact the persistence and regular growth of hair. Types of hair diseases include folliculitis, hirsutism, hypertrichosis, hypotrichosis ( alopecia ), Menkes kinky hair syndrome, monilethrix, and piedra. [ 1]
50% of males, 25% of females (pattern hair loss by age 50) [ 4][ 6] Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. [ 2] Typically at least the head is involved. [ 4] The severity of hair loss can vary from a small area to the entire body. [ 7] Inflammation or scarring is not usually ...
Pattern hair loss (also known as androgenetic alopecia ( AGA) [ 1]) is a hair loss condition that primarily affects the top and front of the scalp. [ 2][ 3] In male-pattern hair loss ( MPHL ), the hair loss typically presents itself as either a receding front hairline, loss of hair on the crown and vertex of the scalp, or a combination of both.
Although research is somewhat limited, there is evidence that lacking vitamin D can affect healthy hair growth, resulting in shedding, thinning and patchy hair loss across the scalp. Experts aren ...
Uncombable hair syndrome ( UHS) is a rare structural anomaly of the hair with a variable degree of effect. It is characterized by hair that is silvery, dry, frizzy, wiry, and impossible to comb. [ 4] It was first reported in the early 20th century. [ 5] It typically becomes apparent between the ages of 3 months and 12 years. [ 6]
This is a list of major and frequently observed neurological disorders (e.g., Alzheimer's disease), symptoms (e.g., back pain), signs (e.g., aphasia) and syndromes (e.g., Aicardi syndrome). There is disagreement over the definitions and criteria used to delineate various disorders and whether some of these conditions should be classified as ...
Hypertrichosis (often mistakenly classified as hirsutism) is a well documented condition in horses with a hormonal disorder of the hypothalamus, called Cushing's disease. It is the most common endocrine disease of the middle-aged to older horse, often resulting in fatal laminitis.
Poliosis. Depigmentation of sections of skin and hair in 48-year-old man with vitiligo and poliosis. Poliosis (also called poliosis circumscripta) is the decrease or absence of melanin (or colour) in head hair, eyebrows, eyelashes, or any other hirsute area. It is popularly known as white forelock when it affects hair directly above the forehead.