transitional epithelium

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transitional epithelium

[tran′zish·ən·əl ‚ep·ə′thē·lē·əm]
(histology)
A form of stratified epithelium found in the urinary bladder; cells vary between squamous, when the tissue is stretched, and columnar, when not stretched.
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The different types of cells in urine were leukocytes and few transitional epithelia in cystitis and pyuria, erythrocytes in hematuria and pleiomorphic, multi-nucleated transitional epithelia in transitional cell carcinoma (Fig.
For the latter, they are called transitional epithelia (urothelium).
In one patient, the cyst was lined with squamous and transitional epithelia and contained lymphoid follicles in the subepithelial plane.

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