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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 ...
A leiomyosarcoma (LMS) is a rare malignant (cancerous) smooth muscle tumor. [1] The word is from leio- 'smooth' myo- 'muscle' and sarcoma 'tumor of connective tissue'. The stomach, bladder, uterus, blood vessels, and intestines are examples of hollow organs made up of smooth muscles where LMS can be located; however, the uterus and abdomen are the most common sites.
No or mild atypia, no tumor cell necrosis ⇒ leiomyoma. If 5 or more mitotic figures are present in 10 high powered fields but the behavior still appears benign, may append “with significant mitotic activity”. Moderate to severe atypia without tumor cell necrosis atypical leiomyoma if < 10 mitotic figures per high power field or
However, a small proportion of uterine fibroids can mimic other malignant uterine tumors (e.g. leiomyosarcoma) on all available imaging modalities (e.g. ultrasound, CT, MRI and PET-CT). [37] Malignant tumors of the uterine wall (e.g. leiomyosarcoma) are very rare.
Substantially elevated risk of progression to or independent development of uterine leiomyosarcoma has been reported which may influence treatment methods. [3] The predisposition to renal cell cancer calls for screening and, if necessary, urological management.
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Uterine sarcoma is rare and mostly occurs in post-menopausal women. The most common type, leiomyosarcoma, is twice as common in Black women as it is in white women. Uterine sarcoma condition is most commonly treated by radical hysterectomy. If cancer has spread beyond the uterus, radiation, chemotherapy, and hormonal therapy may be used.
Cutaneous leiomyoma, also known as leiomyoma cutis, [1] or cutaneous leiomyomata, [2] is a benign skin tumor made of smooth muscle cells. [3] There are three different types of cutaneous leiomyomas, genital leiomyomas, angioleiomyomas, and piloleiomyomas. Cutaneous leiomyomas can occur sporadically or as a part of a genetic condition.