<unk>  An<unk>  is a noninfiltrative, circumscribed proliferation of endometrial<unk>  cells and is a benign subtype of endometrial<unk>  tumor. The appearance of the cells is identical to normal endometrial<unk>  cells. This can only be differentiated from low-grade endometrial<unk>  sarcoma by confirming lack of infiltration. The differential includes cellular leiomyoma. Diagnosis may be aided by immunostaining;<unk> s are positive for CD10; leiomyomas are positive for caldesmon and desmin (and sometimes CD10).
Endometrial stromal nodule
Adnexal mass
Endometrial polyp
Atypical polypoid adenomyoma
Ectopic decidua
Immature ovum
Stenosis of uterine cervix
Endometrial stromal tumour