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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.
A myxoid tumor is a connective tissue tumor with a "myxoid" background, composed of clear, mucoid substance. [1] Atrial myxoma. This tumoral phenotype is shared by many tumoral entities: Myxomas. Atrial myxoma; Odontogenic myxoma; Cutaneous myxoma; Intramuscular myxoma; Myxoid hamartoma; Aggressive angiomyxoma; Myxoid leiomyoma; Chondromyxoid ...
A thin arborizing vascular network, a large myxoid stroma, mild to moderate cellularity with spindled to stellate cells with little or mild atypia, and the lack of nuclear pleomorphism or mitotic activity are among the histologic markers that are consistently present in cutaneous myxoma.
If dead nuclei present, they are uniform and the chromatin is often. Necrosis secondary to ulceration in submucous leiomyomas features acute inflammatory cells and a peripheral reparative process, whereas ghost outlines of nuclei are usually inconspicuous or absent.
Myxoma is a rare, benign stromal tumor of mesenchymal origin often confused with other conjunctival stromal tumors. Conjunctival myxomas are thought to originate in Tenon's capsule and can masquerade as conjunctival lymphoma, lymphangioma, ocular surface squamous neoplasia (OSSN), or amelanotic melanoma.
Of particular importance, the presence of pseudo-lipoblasts in a myxoid sarcoma-like background is an extremely strong indicator that the tumor is a MFS. [ 6 ] and tumors with a myxofibrosarcoma-like histopathology that initiate in the retroperitoneum, abdominal cavity, or pelvis are nearly always dedifferentiated liposarcomas .
A myxoid liposarcoma is a malignant adipose tissue neoplasm [1] of myxoid appearance histologically.. Myxoid liposarcomas are the second-most common type of liposarcoma, representing 30–40% of all liposarcomas in the limbs, occurring most commonly in the legs, particularly the thigh, followed by the buttocks, retroperitoneum, trunk, ankle, proximal limb girdle, head and neck, and wrist.
Low-grade fibromyxoid sarcoma (LGFMS) is a rare type of low-grade sarcoma first described by H. L. Evans in 1987. [1] LGFMS are soft tissue tumors of the mesenchyme -derived connective tissues ; on microscopic examination, they are found to be composed of spindle-shaped cells that resemble fibroblasts . [ 2 ]