What to do if i have a small lump on my right butt cheek. could it be cancer?

Rare: The majority of lesions that develop in the buttock are lipomas from the fat present. These are non tender and usually just under the skin. In rare instances sarcomas develop which are firm lesions, can grow relatively quickly and are usually large when identified because there are deeply seated. If such is present a bx is indicated followed by a radical gluteal resection to encompass it.