Villi of complete hydatidiform mole (human)

(A) Macroscopy aggregation (1) of abnormal villi of hydatidiform mole intermingled with blood clots (2). (B) After dissection of a complete mole grape-like aggregations of dilated chorionic villi are presented as numerous liquid-filled vesicles (1) varying in diameters (from few mm up to 1 cm) surrounded by blood clots (→ 2). The composition of the liquid resembles that of young chorionic villous stroma. (By courtesy of G. P. Vooijs MD, PhD, former Head of the Department of Pathology, and the Museum of Anatomy and Pathology, University Medical Center, St. Radboud University, Nijmegen, The Netherlands)