( J ) Negative BCL2 immunostain is a follicular lymphoma marker; thus, the negative staining rules out follicular lymphoma in this lesion
( J ) Negative BCL2 immunostain is a follicular lymphoma marker; thus, the negative staining rules out follicular lymphoma in this lesion. described by Castleman et al in 1954 in a group of patients with localized lymph node hyperplasia. 2 3 The etiology of CD remains largely unknown; the pathogenesis show inflammatory response to a mysterious antigenic stimulus with chemical mediators (cytokines) of inflammation particularly interleukin-6 (IL6) playing a prominent role. 1 2 CD can be categorized histomorphologically into three distinct subtypes, namely: hyaline vascular, plasma cell, and mixed hyaline vascular plasma cell types. 1 2 4 5 6 7 8 CD also has two clinicopathological presentations, namely: unicentric Castleman disease (UCD) and multicentric Castleman disease (MCD) forms, wherein the unicentric forms are more common. 1 2 5 6 8…