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The Evolving Spectrum of Endometrial Glandular Proliferations With Corded and Hyalinized Features.
The Evolving Spectrum of Endometrial Glandular Proliferations With Corded and Hyalinized Features. The American journal of surgical pathology Pors, J., Weiel, J. J., Ryan, E., Longacre, T. A. 2023Abstract
We present the clinicopathologic and immunohistochemical features of 14 endometrial glandular proliferations with conspicuous corded and hyalinized (CH) features comprised entirely or predominantly of endometrial hyperplasia. Endometrial glandular lesions ranged in severity from endometrial hyperplasia with and without cytologic atypia (5/14 [36%]) to hyperplasia with architectural complexity bordering on well-differentiated endometrioid adenocarcinoma (3/14 [21%]) to frank corded and hyalinized endometrial carcinoma ("CHEC") (6/14 [43%]). In addition to sex cord-like growth and hyalinized stroma, other common histologic features included prominent spindle cells (11/14 [79%]), keratinizing and/or morular squamous differentiation (10/14 [71%]), and osseous metaplasia (6/14 [43%]). Immunohistochemical characterization revealed aberrant nuclear beta-catenin in all cases (14/14 [100%]); additionally, all cases demonstrated positive estrogen receptors, intact PTEN, PMS2 and MSH6, and wild-type p53 expression. Patients ranged in age from 24 to 58 (mean 38) years. Of 5 patients with hyperplasia with CH features, 2 experienced complete resolution after progestin therapy and none progressed to adenocarcinoma (mean follow-up 15.6mo, range 2 to 64). By contrast, of 2 patients with hyperplasia bordering on CHEC and with available follow-up, both subsequently developed adenocarcinoma, suggesting that even focal increased architectural complexity may predict an elevated risk of malignancy. We conclude that CH morphology is not limited to endometrioid carcinoma and may occur across a spectrum of neoplastic proliferations, including those without sufficient architectural complexity or cytologic atypia to warrant classification as adenocarcinoma. We propose the term "corded and hyalinized endometrial hyperplasia" to describe this precursor lesion and report favorable outcomes with conservative treatment.
View details for DOI 10.1097/PAS.0000000000002078
View details for PubMedID 37493099