Rosa Parks and the Montgomery Bus Boycott. 1  Rosa Parks rode at the front of a Montgomery, Alabama, bus on the day the Supreme Court's ban on segregation of the city's buses took effect. A year earlier, she had been arrested for refusing to give up her seat on a bus.
A lipoma is a mass or lump that is composed of adipocytes or fat cells. Lipoma is a very common, noncancerous tumor that grows slowly. Oftentimes, they build up beneath our skin, specifically in the subcutaneous layer. This is the layer that is found between the skin and the muscle layer. Lipomas can advance in size and numerous growths can occur.
Lipomas - Pathophysiology. 1  Lipomas are common benign mesenchymal tumors. 2  In the GI tract, lipomas present as submucosal fatty tumors. 3  Duodenal lipomas are mostly small but may become pedunculated with obstruction of the lumen. 4  Colonic lipomas are usually discovered on endoscopy. Gentle palpation with a biopsy forceps reveals the soft nature of the submucosal mass. A biopsy specimen of the mucosa may reveal underlying fat, the so-called naked fat sign. As with lipomas in other locations, colonic lipomas may cause pain with obstruction or intussusception. As noted above, a fatty protrusion of preperitoneal fat termed a lipoma of the spermatic cord is a common finding on groin exploration for hernia repair.