Syndrome, Pisa
A condition in which there is sustained involuntary flexion of the body and head to one side and slight rotation of the trunk so the person appears to lean like the Leaning Tower of Pisa.
The Pisa syndrome is an adverse effect (a side-effect) of some medications. It occurs sometimes following the long-term use of narcoleptics (drugs used to treat schizophrenia) or cholinesterase inhibitors (a class of drugs used to treat Alzheimer disease).
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- Syndrome, piriformis
Irritation of the sciatic nerve caused by compression of the nerve within the buttock by the piriformis muscle. Typically, the pain of the piriformis syndrome is increased by contraction of the piriformis muscle, prolonged sitting, or direct pressure applied to the muscle. Buttock pain is common. The piriformis syndrome is one of the causes of […]
- Syndrome, Pickwickian
The combination of obesity, somnolence (sleepiness), hypoventilation (underbreathing), and plethoric (red) face. The syndrome is so named because of the “fat and red-faced boy in a state of somnolency” that Charles Dickens described in his novel, The Pickwick Papers. (The same boy is thought by some experts possibly to have had the Prader-Willi syndrome).
- T-4 cell
those that activate other T cells to achieve cellular inflammatory responses; and those that drive B cells to produce antibodies in the humoral immune response. These two classes of response are generally incompatible with one another and require coordination by substances called cytokines to promote one response while dampening the other. The HIV virus attacks […]
- T-8 cells
T cells that express the CD8 transmembrane glycoprotein (CD8+ T cells). They close down the immune response after invading organisms are destroyed. Suppressor T cells are sensitive to high concentrations of circulating lymphokine hormones, and release their own lymphokines after an immune response has achieved its goal. This signals all other immune-system participants to cease […]
- T-cell depletion
Treatment designed to destroy T cells, which play an important role in the immune response. Elimination of T cells from a bone marrow graft from a donor may reduce the chance of graft-versus-host disease (an immune reaction against the recipient’s tissues).