Reactive intralymphovascular immunoblastic proliferations➡️ Recurrent theme in #Hemepath consultations sent from other #surgpath services Cases with these proliferations are typically sent by #GIpath (most commonly in resected appendices or GI segments for obstruction) or #ENTpath (tonsillar tissue as seen in example below) Histologic sections show focally expanded lymphovascular spaces filled by B-immunoblasts that may mimic aggressive lymphomas These B-immunoblasts demonstrate a postgerminal center immunophenotype, with positivity for CD38, CD43, CD45, CD79a, and MUM1/IRF4, and a high Ki67 proliferation index For more on this➡️pubmed.ncbi.nlm.nih.gov/3431… #lymsm #PathX #PathtTwitter

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