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Arias-Stella reaction[ah´ryahs stel´ah]
nuclear and cellular hypertrophy of the endometrial epithelium associated with ectopic pregnancy.
A·ri·as-·Ste·lla phe·nom·e·non(ahr'yahs stel'ă),
focal, unusual, decidual changes in endometrial epithelium, consisting of intraluminal budding, and nuclear enlargement and hyperchromatism with cytoplasmic swelling and vacuolation; may be associated with ectopic or uterine pregnancy.
Arias-Stella reactionA dysmorphic change in the endometrial glands that closely simulates an adenocarcinoma. The ASR is hormonally induced and regarded as a typical endometrial reaction in ectopic pregnancy, which may be seen in trophoblastic disease; it is rare in normal intrauterine pregnancies.
Arias-Stella,Javier, Peruvian pathologist, 1924–.
Arias-Stella effect - focal, unusual, decidual changes in endometrial epithelium that may be associated with ectopic or uterine pregnancy. Synonym(s): Arias-Stella phenomenon; Arias-Stella reaction
Arias-Stella phenomenon - Synonym(s): Arias-Stella effect
Arias-Stella reaction - Synonym(s): Arias-Stella effect