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WHO Classification of Tumours
Lipoma, NOS
Colon and rectum


Lipoma is the most common soft tissue tumour and composed of mature white adipocytes
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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

. It typically manifests in adults and surgical resection is usually curative.

Lipoma of the colon and rectum
Submucosal lipomas occur especially in the colon, usually detected in older adults as an incidental finding. Larger tumours may cause obstruction, ulcerate and undergo necrosis resulting in gastrointestinal haemorrage. Histologically, there is mature adipose tissue without significant atypia. Thick-walled dilated blood vessels are often present in these lipomas, although they differ from peripheral angiolipomas

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Bosman FT, Carneiro F, Hruban RH, Theise ND (Eds.)
WHO Classification of Tumours of the Digestive System.
4th Edition
International Agency for Research on Cancer: Lyon 2010