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WHO Classification of Tumours
Leiomyoma, NOS
Connective, subcutaneous and other soft tissues


Definition

Leiomyoma is a well-circumscribed benign smooth muscle neoplasm histologically characterized by the presence of spindle cells with cigar-shaped nuclei, interlacing fascicles, and a whorled pattern
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Eble JE, Sauter G, Epstein JI, Sesterhenn IA (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Urinary System and Male Genital Organs.
3rd Edition
IARC Press: Lyon 2004



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> Lipoleiomyoma
Lipoleiomyoma (myolipoma) is an encapsulated tumour that shows characteristics of mature adipose tissue intermingled with fascicles of mature smooth muscle. Most tumours are located deeply and involve abdominal cavity, retroperitoneum, and inguinal areas. They range in size between 10 and 25 cm

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Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
3rd Edition
IARC Press: Lyon 2002



. Myolipoma of soft tissue is extremely rare. It occurs in adults, with a male to female ratio of 1:2. Tumours do not recur; complete surgical resection is curative
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Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
3rd Edition
IARC Press: Lyon 2002



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