Let's dive into some wonderful images from the new Non-Neoplastic Disorders of Bone Marrow fascicle (
arppress.org/books/book/71)!
Crystal-storing histiocytosis is a rare reactive proliferation of histiocytes containing abundant crystallized immunoglobulin inclusions (highlighted by PAS), seen in plasma cell myeloma, MGUS, and (less commonly) B-cell lymphomas.
#HemePath