Zebra
‘When you hear hoof beats, think of horses, not zebras.’ For example, when someone develops a mild transient cough, a virus infection is the most logical and likely cause, and tuberculosis is a zebra.
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- ZAP-70
Zeta-chain-associated protein kinase 70. A member of the protein tyrosine kinase family, ZAP-70 is normally expressed in T cells and natural killer cells and has a critical role in the initiation of T-cell signaling. ZAP-70 is expressed in T cells and tumors of T-cell lineage. A high level of ZAP-70 expression appears restricted to T-cell […]
- Z chromosome
A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.
- Birt-Hogg-Dube syndrome
Birt-Hogg-Dube syndrome: An inherited condition in which benign tumors develop in hair follicles on the head, chest, back, and arms. These tumors are called fibrofolliculomas. Other characteristic skin abnormalities are trichodiscomas and acrochordons. A trichodiscoma is a tumor of the hair disc while an acrochordon is a skin tag. People with this syndrome are at […]
- Section
1) In anatomy, a slice of tissue. A biopsy obtained by surgery is usually sectioned (sliced), and these sections are inspected under a microscope. 2) In obstetrics, short for Cesarean section. 3) In surgery, the division of tissue during an operation.