Elucidating the grading intricacies of idiopathic multicentric Castleman disease histopathology: a pathologist’s perspective

The diagnosis of iMCD can be challenging and requires a multidisciplinary team of hematologists, pathologists/hematopathologists, and other specialists. There is a pressing and unmet clinical need for a harmonized system to grade the histopathologic features of iMCD. This condition should be included in the differential diagnosis when other causes of a lymphoproliferative disorder (eg, infections, autoimmune/inflammatory disorders, malignancy) have been ruled out.