Sinusoidal Large B-Cell Lymphoma: A Cytologic Mimic of Carcinoma and Intravascular Large B-Cell Lymphoma.

Sinusoidal large B-cell lymphoma (SLBCL) is a rare morphologic variant of diffuse large B-cell lymphoma that is associated with poor outcomes. The diagnosis of SLBCL may be challenging due to its unique morphologic features on cytologic preparation and histologic section. This case report describes the incidental diagnosis of SLBCL with a focus on comparative cyto-histologic findings.