MedGen

A locally aggressive mesenchymal neoplasm composed either entirely or partly of an adipocytic proliferation showing at least focal nuclear atypia in both adipocytes and stromal cells. ""Atypical lipomatous tumor"" and ""well-differentiated liposarcoma"" are synonyms describing lesions that are morphologically and genetically identical. Amplification of MDM2 and/or CDK4 is almost always present. (WHO 2020) [from NCI]

Well-differentiated liposarcoma (WDLS), the most common type of liposarcoma (LS; see this term), is a slow growing, painless tumor usually located in the retroperitoneum or the limbs. It is composed of proliferating mature adipocytes. [from ORDO]

Inflammatory bowel disease is a systemic disorder comprised of two major disorders: ulcerative colitis and Crohn disease. Crohn disease can affect any part of the digestive system while ulcerative colitis is confined to the colon. Both disorders may affect sites outside of the digestive system [from SNOMEDCT_US]

Gastrointestinal symptoms characterized by chronic abdominal pain and altered bowel habits in the absence of any organic cause. [from NCI]