Arias-Stella reaction

Micrograph showing Arias-Stella reaction in endometrium

Arias-Stella reaction, also Arias-Stella phenomenon, is a benign change in the endometrium associated with the presence of chorionic tissue.[1]

Arias-Stella reaction is due to progesterone primarily. Cytologically, it looks like a malignancy and, historically, it was diagnosed as endometrial cancer.[1]

  1. ^ a b Arias-Stella, J. (Jan 2002). "The Arias-Stella reaction: facts and fancies four decades after". Adv Anat Pathol. 9 (1): 12–23. doi:10.1097/00125480-200201000-00003. PMID 11756756. S2CID 26249687.