Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Delayed involution of lactation presenting as a non-resolving breast mass: a case report | Journal of Medical Case Reports BioMed Central Open Access Case report Delayed involution of lactation presenting as a non-resolving breast mass a case report Yashwant Kumar1 Alka Chahal1 Monika Garg1 Alka Bhatia 1 NC Mahajan1 and Anil Ganju2 Address Department of Pathology Maharshi Markandeshwar Institute of Medical Sciences and Research Mullana Ambala Haryana India and department of General Surgery Maharshi Markandeshwar Institute of Medical Sciences and Research Mullana Ambala Haryana India Email Yashwant Kumar - ykabh@ Alka Chahal - alka_chahal@ Monika Garg - monikakash7@ Alka Bhatia - yashwantk74@ NC Mahajan - jastinu@ Anil Ganju - Ganjuanil3r@ Corresponding author Published 13 October 2008 Received 2 January 2008 Journal of Medical Case Reports 2008 2 327 doi 1752-1947-2-327 Accepted 13 October 2008 This article is available from http content 2 1 327 2008 Kumar et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Introduction Involution of lactation is a physiological process. Rarely it may be delayed and troublesome for the lactating woman. Though lactation-induced changes in breast are well known morphological features of delayed involution are not clear. Case presentation We report a case of a 22-year-old lactating mother who presented with a painful non-resolving breast mass 5 months after delivery. Clinically it simulated an inflammatory carcinoma. Histopathology however revealed involuting lactational changes. Conclusion To the best of our knowledge lactational involution with such a presentation has not been described in the English literature. The case needs to be reported so that this entity can be .