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Ichthyosis (also named fish scale disease) [1] is a family of genetic skin disorders characterized by dry, thickened, scaly skin. [2] The more than 20 types of ichthyosis range in severity of symptoms, outward appearance, underlying genetic cause and mode of inheritance (e.g., dominant, recessive, autosomal or X-linked). [3]
Most infants do not live past a week. Those who survive can live from around 10 months to 25 years thanks to advanced medicine. [22] A study published in 2011 in the Archives of Dermatology concluded: "Harlequin ichthyosis should be regarded as a severe chronic disease that is not invariably fatal. Survival has increased with improved neonatal ...
It is less abundant in the eastern Atlantic, where it mostly occurs off Africa between the latitudes of 25°N and 25°S. The largest numbers are usually found in waters warmer than 24 °C (75 °F), but blue marlin have been found at surface water temperatures as high as 30.5 °C (86.9 °F) and as low as 21.7 °C (71.1 °F). [22]
Severe cases, although rare, do exist. Severe cases entail the buildup of scales everywhere, with areas of the body that have a concentration of sweat glands being the least affected. Areas where the skin rubs against together, such as the armpits, the groin, and the "folded" areas of the elbow and knees, are less affected.
Scale forms on the skin surface in various disease settings, and is the result of abnormal desquamation. In pathologic desquamation, such as that seen in X-linked ichthyosis, the stratum corneum becomes thicker (hyperkeratosis), imparting a "dry" or scaly appearance to the skin, and instead of detaching as single cells, corneocytes are shed in clusters, which forms visible scales. [2]
A taxidermied marlin greets visitors to Dare County, North Carolina. In the Nobel Prize -winning author Ernest Hemingway's 1952 novel The Old Man and the Sea , the central character of the work is an aged Cuban fisherman who, after 84 days without success on the water, heads out to sea to break his run of bad luck.
Dr. Rebecca MacMillan, a vet with over 15 years of experience, says she regularly sees four skin conditions in particular: skin allergies, parasites, acute moist dermatitis, and endocrine disease.
Ichthyosis hystrix is a group of rare skin disorders in the ichthyosis family of skin disorders characterized by massive hyperkeratosis with an appearance like spiny scales. [1] This term is also used to refer to a type of epidermal nevi with extensive bilateral distribution. [1] [2]