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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
A myoma is a type of tumor that involves muscle cells. [1] There are two main types of myoma: Leiomyomas which occur in smooth muscle. [1] They most commonly occur as uterine fibroids, but may also form in other locations. Rhabdomyomas which occur in striated muscle. [1] [2] [3] They are rare tumors. So-called adult rhabdomyoma has been ...
Endometrial intraepithelial neoplasia (EIN) is a premalignant lesion of the uterine lining that predisposes to endometrioid endometrial adenocarcinoma. It is composed of a collection of abnormal endometrial cells, arising from the glands that line the uterus , which have a tendency over time to progress to the most common form of uterine cancer ...
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 ...
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).
Arias-Stella reaction, also Arias-Stella phenomenon, is a benign change in the endometrium associated with the presence of chorionic tissue. [1] Arias-Stella reaction is due to progesterone primarily. Cytologically, it resembles a malignancy and, historically, it was misdiagnosed as endometrial cancer. [1]
Therefore, some studies have shown that the condition is harder to cure if the cancer has spread to the liver or brain or β-hCG level is higher than 40,000 mIU/mL when treatment begins, cancer returns after having chemotherapy or symptoms/ pregnancy occurred for more than 4 months before treatment.