cystadenoma /sis′tədinō″mə/ pl. cystadenomas, cystadenomata [Gk, kystis + aden, gland, oma, tumor] , 1. an adenoma associated with a cystoma. 2. an adenoma containing multiple cystic structures. The cysts may be serous, containing serum, or pseudomucinous, containing clear serous fluid or thick, viscid fluid.
