An<unk>  is an epithelial tumor composed of oncocytes, large eosinophilic cells having small, round, benign-appearing nuclei with large nucleoli.<unk>  can arise in a number of organs.
Oncocytoma
Pineocytoma
Mastocytoma
Histiocytoma
Melanocytoma
Angiolipoma
Pleomorphic adenoma
Renal oncocytoma