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Lipoatrophia semicircularis, also known as semicircular lipoatrophy, [1] is a medical condition in humans, commonly known as ribbed thighs. It consists of a semicircular zone of atrophy of the subcutaneous fatty tissue located mostly on the front of the thighs. Skin and underlying muscles remains intact.
Lipodystrophy syndromes are a group of genetic or acquired disorders in which the body is unable to produce and maintain healthy fat tissue. [ 1 ] [ 2 ] The medical condition is characterized by abnormal or degenerative conditions of the body's adipose tissue .
Acquired generalized lipodystrophy (AGL), also known as Lawrence syndrome [1] and Lawrence–Seip syndrome, [1] is a rare skin condition that appears during childhood or adolescence, characterized by fat loss affecting large areas of the body, particularly the face, arms, and legs.
In a sense, the "opposite" of injection site lipohypertrophy is injection site lipoatrophy, in which the subcutaneous fat around an injected area "melts away" over a few weeks or months, leaving unsightly, well-demarcated depressions in the skin. The mechanism of this local lipoatrophy is not understood and may involve autoimmunity or local ...
Lipoatrophy is the term describing the localized loss of fat tissue. This may occur as a result of subcutaneous injections of insulin in the treatment of diabetes , from the use of human growth hormone or from subcutaneous injections of copaxone used for the treatment of multiple sclerosis .
Muscle atrophy from intristic disease in an 18-year-old woman, weight 27 pounds (12.2 kg) Muscle atrophy from intristic disease in a 17-year-old girl with chronic rheumatism. Muscle diseases, such as muscular dystrophy, amyotrophic lateral sclerosis (ALS), or myositis such as inclusion body myositis can cause muscle atrophy. [13]
Fatty liver and muscle hypertrophy arise from the fact that lipids are instead stored in these areas; whereas in a healthy individual, lipids are distributed more uniformly throughout the body subcutaneously. The absence of adipose tissue where they normally occur causes the body to store fat in the remaining areas. [7]
CT shows muscle oedema with preserved tissue planes (non-contrast enhancing). MRI is the exam of choice and shows increased signal on T2 weighted images within areas of muscle oedema. Contrast enhancement is helpful but must be weighed against the risk of Nephrogenic Systemic Fibrosis as many diabetics have underlying chronic kidney disease .