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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).
M8650/3 Leydig cell tumor, malignant Interstitial cell tumor, malignant; M8660/0 Hilus cell tumor (C56.9) Hilar cell tumor; M8670/0 Lipid cell tumor of ovary (C56.9) Lipoid cell tumor of ovary; Steroid cell tumor, NOS; Masculinovoblastoma; M8670/3 Steroid cell tumor, malignant M8641/0 Adrenal rest tumor
Leiomyoma enucleated from a uterus. External surface on left; cut surface on right. Micrograph of a small, well-circumscribed colonic leiomyoma arising from the muscularis mucosae and showing fascicles of spindle cells with eosinophilic cytoplasm and elongated, cigar-shaped nuclei Immunohistochemistry for β-catenin in uterine leiomyoma, which is negative as there is only staining of cytoplasm ...
Smooth muscle tumor of uncertain malignant potential, abbreviated STUMP, is an uncommon tumor of the uterine smooth muscle that may behave like a benign tumor or a cancerous tumor. This tumor should not be confused with the prostatic stromal tumor of uncertain malignant potential which may be abbreviated the same way ( STUMP ).
Uterine adenosarcoma have, by definition, a malignant stroma and benign glandular elements. The World Health Organization (WHO) criteria have a mitotic rate cut point; however, this is often disregarded, as bland-appearing tumours with a low mitotic rate are known to metastasize occasionally.
C and D. Immunohistochemistry of p53 shows that high-grade serous carcinoma cells are diffusely positive for p53, a pattern consistent with a missense TP53 mutation while the adjacent epithelial cells from the background serous borderline tumor are only focally and weakly positive, a pattern consistent with a wild-type TP53 sequence.
Ovarian endometrioid tumors are part of the surface epithelial tumor group of ovarian neoplasms (10–20% of which are the endometrioid type). Benign and borderline variants are rare, as the majority are malignant. There is an association with endometriosis and concurrent primary endometrial carcinoma (endometrial cancer).
The cure rate is very high in cases on benign cystic lesions, but the case changes if malignant changes ensue. [4] Benign cystadenomas are the most common cystic tumors of the pancreas accounting for 75% of the cases. On average, mucinous accounts for 40–50% of cystic tumors, and serous cytadenoma accounts for 30% of it.