Category: P

  • Pityriasis rosea

    A mild irritating rash affecting young people, which appears especially in the early part of the year and has no known cause. A benign (noncancerous) skin rash that usually begins with a single oval patch and then spreads. The original patch, which may be rosy pink, salmon, or tan, commonly appears on the trunk. Within…

  • Pityriasis alba

    A disease affecting children which results in flat white patches on the cheeks that usually heal naturally. A common asymptomatic disorder characterized by round or oval, white, scaly patches on the skin. Patches most commonly occur on the cheeks but may also occur elsewhere on the face or on the upper arms, thighs, and neck.…

  • Pituitrin

    A hormone secreted by the pituitary gland. A branded formula derived from the hormone of the pituitary gland’s posterior lobe.  

  • Pitting

    The formation of hollows in the skin. The formation of depressed scars, as occurs on the skin following smallpox or acne. Pitting edema is swelling of the tissues due to excess fluid in which fingertip pressure leaves temporary indentations in the skin. The formation of pits, depressions, or scars, as in smallpox. The development of…

  • Pithiatism

    A way of influencing someone’s mind by persuading him or her of something, as when a doctor treats a condition by telling the person that he or she is in fact well. The treatment of certain disorders by persuading the patient that all is well. Disorders that disappear in these circumstances are regarded as manifestations…

  • Pit of the stomach

    The epigastrium, the part of the upper abdomen between the ribcage above the navel. Colloquial term for the depression at the end of the xiphoid process.  

  • Piroxicam

    A non-steroidal anti-inflammatory drug used in the treatment of rheumatoid arthritis and osteoarthritis. Nonsteroidal anti-inflammatory agent used in the treatment of osteoarthritis, rheumatoid arthritis, and other inflammatory conditions. Adverse effects include gastrointestinal bleeding and nausea. An intermediate risk, oral non-steroidal anti-inflammatory drug with prolonged action. Used to treat pain and inflammation in rheumatoid arthritis, other…

  • Piriton

    A trade name for chlorpheniramine.  

  • Piriform fossae

    The two hollows at the sides of the upper end of the larynx. Two pear-shaped depressions that lie on either side of the opening to the larynx.  

  • Pipette

    A thin glass tube used in the laboratory for taking or measuring samples of liquid.