Noun
amyloidoma (plural amyloidomas or amyloidomata)
A mass of amyloid (misfolded proteins and polysaccharides) that has collected in an anatomic site as a result of any of various types of amyloidosis; it is not, strictly speaking, a benign tumor (because it is not a lump of cells but rather extracellular protein), but it can produce mass effect like a benign tumor would.