Diagnostic challenges of indolent peripheral T cell lymphoma: A case report and literature review.

These indolent PTCLs histologically show diffuse infiltrated small lymphoid cells with low KI-67 labeling index and have a relatively good prognosis, although the epidemiology and pathogenesis are not fully elucidated. We report a case of indolent PTCL with cytogenetic abnormalities and poor response to chemotherapy, along with a brief review of the literature.