Blastoïd mantle cell lymphoma, TdT-positive: Toward a more juvenile profile? (PubMed, Ann Pathol)
We report a 63 year-old man with bone marrow involvement by mantle cell lymphoma displaying an immunohistochemical profile CD20+, CD5+, cyclin D1+, SOX11-, with distinctive features including blastoid morphology, diffuse TdT expression, and MYC gene rearrangement. This exceptional association of blastoid morphology, TdT expression, and MYC rearrangement in mantle cell lymphoma suggests a process of tumor dedifferentiation and broadens the clinico-biological spectrum of mantle cell lymphoma, raising significant diagnostic and prognostic challenges.