Pilonidal cyst
An abscess that occurs in the cleft between the buttocks at the base of the tailbone (coccyx). Pilonidal cysts are common in adolescence, often after long trips that involve sitting.
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- Pilonidal sinus
A sinus tract from which there may be chronic drainage of pus, due to an embedded tuft of hair, most often in the crease between the buttocks, but can occur elsewhere in the body, as between the fingers in barbers, hairdressers, and animal groomers. Surgical removal of the hair and the inflammatory tissue cures the […]
- Pimple
An inflamed area of the skin with pus formation that results from an oil gland being infected with bacteria. Pimples are due to overactivity of the oil glands located at the base of the hair follicles, especially on the face, back, chest, and shoulders.
- Pimply
Having pimples. Papuliferous and papilliferous are fancy words for what is simply pimply.
- Pin1
An enzyme that permits brain cells to function normally. Pin1 may also protect against Alzheimer’s disease. The enzyme is clearly involved in regulating mitosis (cell division). The Pin1 level in the brains of Alzheimer patients is greatly reduced as compared to age-matched normal brains. The depletion of Pin1 may induce mitotic arrest and apoptotic cell […]
- Pineal gland
A small gland that is located near the center of the brain. This gland secretes melatonin, and it may therefore be part of the body’s sleep-regulation apparatus. Also known as pineal body.