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An endometrial stromal nodule is a noninfiltrative, circumscribed proliferation of endometrial stromal cells and is a benign subtype of endometrial stromal tumor. The appearance of the cells is identical to normal endometrial stromal cells. This can only be differentiated from low-grade endometrial stromal sarcoma by confirming lack of ...
Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. GISTs arise in the smooth muscle pacemaker interstitial cell of Cajal, or similar cells. [2] They are defined as tumors whose behavior is driven by mutations in the KIT gene (85%), [2] PDGFRA gene (10%), [2] or BRAF kinase (rare).
The prognosis for these types of tumors depends heavily on the size of the tumor and the rate of mitosis, however approximately 60 percent of GISTs are diagnosed as benign. [4] Surgery to remove the tumor is the primary treatment method, although imatinib, everolimus, and rapamycin may soon be approved as alternative treatment and management ...
Leiomyoma is the most common benign mesenchymal tumor of esophagus and second most common benign tumor of the small bowel (with gastrointestinal stromal tumor as most common). [7] Although leiomyoma is the most common benign esophageal tumor, malignant carcinoma is still 50 times more likely. [8]
Surface epithelial-stromal tumors are a class of ovarian neoplasms that may be benign or malignant. Neoplasms in this group are thought to be derived from the ovarian surface epithelium (modified peritoneum ) or from ectopic endometrial or fallopian tube (tubal) tissue.
Benign mixed tumor [1] Cytopathology of pleomorphic adenoma . It can usually be diagnosed by its typical fibrillary stroma (mesenchyme). Stromal cell nuclei are small. Myoepithelial cells are usually the predominant cell type, and their nuclei can have various shapes but are usually more elongated than in epithelial cells.