Wong et al Brunei International Medical Journal 2025;21:121-124 Brunei International Medical Journal Acute Adhesive Small Intestinal Obstruction with Secondary Jejunal Volvulus WONG Winn Lung1,2, Jien Yen SOH1,2, Muhammad Faeid OTHMAN1,2, Wan Zainira WAN ZAIN1,2, Mohd Nizam MD HASHIM1,2, Chiew Chea LAU3

Castleman’s disease is a rare and complex lymphoproliferative disease with unknown etiology. It can be classified clinically into unicentric or multicentric and histologically into hyaline vascular or plasmacytic variants. Unicentric Castleman’s disease in breast is rarely reported worldwide. We report a case of a young lady presenting with complaint of solitary right breast lump, for which she underwent excision biopsy and was diagnosed of having unicentric Castleman’s disease of breast, hyaline vascular variant.