An ulcerating condition of skin that results in heaped borders with a typical appearance. Pyoderma gangrenosum appears to be mediated by the immune system, but the exact cause is unknown. The lesion usually begins as a soft nodule on the skin that then ulcerates. The ulcer enlarges, and the skin at the edge is purple-red. The ulcers can become quite large. Pyoderma gangrenosum is associated with several other diseases, including ulcerative colitis, Crohn’s disease, rheumatoid arthritis, leukemia, and cryoglobulinemia. Pyoderma gangrenosum is usually responsive to corticosteroids.
- Pyogenic Granuloma
MedlinePlus.com. Pyogenic granuloma.
One of the vitamin B6 group (which also includes pyridoxal and pyridoxamine) that is transformed in the body to pyridoxal phosphate, which functions as a coenzyme, a substance that enhances the action of an enzyme and thereby helps catalyze and speed a biochemical reaction. (A number of vitamins serve as coenzymes.) The vitamin B6 group […]
One of the two classes of bases in DNA and RNA. The pyrimidine bases are thymine (T) and cytosine (C) in DNA and cytosine (C) and uracil (U) in RNA.
- Pyrophosphate arthropathy
Joint damage due to deposition of calcium pyrophosphate. Pyrophosphate arthropathy most commonly affects the knees, wrists and knuckles and tends to be symmetrical.
A technical term for what is popularly called heartburn, a burning sensation in the upper abdomen. In many languages there is a technical term such as pyrosis and a popular term for the same phenomenon. For example, pyrosis is popularly known in French as br�lure epigastrique and in Spanish as ardor de est�mago. Pyrosis is […]