Cancer: Causes and Effects http://www.pathguy.com/lectures/neo-2-3.htm
Chapter from Dr. Ed Friedlander's online textbook. Adiposis Dolorosa (Dercum's Disease) is mentioned (search for "adiposis"). Even though the lipomas (tumors) are benign, they can cause problems just by being, and he lists a number of examples.
Dercum's Disease, also known as Adiposis Dolorosa http://www.dercum.org/
Symptoms, personal stories, and research that has been done in the study of Dercum's Disease. Includes a medical article describing the disease and references to scores of other articles. Chat room on Tuesday evenings.