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Micrograph of a cystic Walthard cell rest (lower right of image) within the connective tissue of a fallopian tube (tubal epithelium – upper left of image). H&E stain . Walthard cell rests , sometimes called Walthard cell nests , are a benign cluster of epithelial cells most commonly found in the connective tissue of the fallopian tubes , but ...
Histologically, there are nests of transitional epithelial cells with longitudinal nuclear grooves (coffee bean nuclei) lying in abundant fibrous stroma. The coffee bean nuclei are the nuclear grooves exceptionally pathognomonic to the sex cord stromal tumour, the ovarian granulosa cell tumour, with the fluid-filled spaces Call–Exner bodies ...
For example, a lipoma is a common benign tumor of fat cells , and a chondroma is a benign tumor of cartilage-forming cells (chondrocytes). Adenomas are benign tumors of gland-forming cells, and are usually specified further by their cell or organ of origin, as in hepatic adenoma (a benign tumor of hepatocytes, or liver cells).
The presence of irregular tumor nests in fatty tissue at right in image confirms the invasive nature. Invasion is the process by which cancer cells directly extend and penetrate into neighboring tissues in cancer. [1]
Desmoplastic small round cell tumour, with desmoplasia surrounding nests of cancer cells.. In medicine, desmoplasia is the growth of fibrous connective tissue. [1] It is also called a desmoplastic reaction to emphasize that it is secondary to an insult.
As the cells grow, the neurite tangle remains centrally located and the cell bodies are squeezed to the periphery, thus explaining the rosette pattern. Depending upon their location, ependymal cells may display 2 cell poles. A luminal pole projects to the ependymal lining of a ventricle and a "submesenchymal pole" projects toward the surface of ...