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Dermatophagia (from Ancient Greek δέρμα — lit. skin and φαγεία lit. eating) or dermatodaxia (from δήξις, lit. biting) [3] is a compulsion disorder of gnawing or biting one's own skin, most commonly at the fingers. This action can either be conscious or unconscious [4] and it is considered to be a type of pica.
Jaccoud arthropathy ( JA ), is a chronic non-erosive reversible joint disorder that may occur after repeated bouts of arthritis. [1] [2] It is caused by inflammation of the joint capsule and subsequent fibrotic retraction, causing ulnar deviation of the fingers, through metacarpophalangeal joint (MCP) subluxation, [1] [3] primarily of the ring ...
Darier's disease (DD) is a rare, genetic skin disorder. It is an autosomal dominant disorder, that is, if one parent has DD, there is a 50% chance than a child will inherit DD. It was first reported by French dermatologist Ferdinand-Jean Darier in 1889. Mild forms of the disease are the most common, consisting of skin rashes that flare up under ...
Autoinflammatory diseases (AIDs) are a group of rare disorders caused by dysfunction of the innate immune system. These responses are characterized by periodic or chronic systemic inflammation, usually without the involvement of adaptive immunity. Autoinflammatory diseases are a separate class from autoimmune diseases; however, both are ...
Crystal arthropathy is a class of joint disorder (called arthropathy) that is characterized by accumulation of tiny crystals in one or more joints. Polarizing microscopy and application of other crystallographic techniques have improved identification of different microcrystals including monosodium urate, calcium pyrophosphate dihydrate ...
Palpable purpura is the clinical manifestation of leukocytoclastic vasculitis, which can be idiopathic or linked to sepsis, reactions to drugs, connective tissue diseases, cryoglobulinemia, hepatitis C or B infection, or underlying cancers. Children and young adults can develop Henoch-Schönlein purpura, a leukocytoclastic vasculitis that is ...
Felty's syndrome ( FS ), also called Felty syndrome, [1] is a rare autoimmune disease characterized by the triad of rheumatoid arthritis, enlargement of the spleen and low neutrophil count. The condition is more common in those aged 50–70 years, specifically more prevalent in females than males, and more so in Caucasians than those of African ...
Physical irritant contact dermatitis is a less-researched form of irritant contact dermatitis [3] due to its various mechanisms of action and a lack of a test for its diagnosis. A complete patient history combined with negative allergic patch testing is usually necessary to reach a correct diagnosis. [4] The simplest form of physical irritant ...