A 27 Year Old Woman Suspected She Was Pregnant,and Performed

A 27 year old woman suspected she was pregnant,and performed a home pregnancy test,which was positive.However,a few weeks later,when she had her first ultrasound,no foetus was detected.Instead,the uterus was filled with round,grape-like masses.A dilation and curettage (D&C) was then performed.Tissue from the procedure was sent to surgical pathology,and a representative section from this material is shown in the accompanying photomicrograph.Which one of the following is the best diagnosis?

A) Endometrial carcinoma
B) Endocervical polyp
C) Endometrial polyp
D) Hydatidiform mole
E) Infection with hydatid tapeworm