Indolent peripheral T-cell lymphoma resembling Kimura's disease: a new variant of T-cell Lymphoma?

Kimura's disease (KD) is a rare chronic inflammatory disorder of unknown etiology prevalent in middle-aged Asian males. Kimura's disease transforming to T-cell lymphoma or coexisting with T-cell lymphoma have not been reported in the scientific literature except two cases of Kimura's disease resembling peripheral T-cell lymphoma morphologically. There was no corresponding entity included in the current WHO classification (5th ed., 2022). It might be a new variant of peripheral T-cell lymphoma. Here, we present the first reported case of coexisting KD and indolent peripheral T-cell lymphoma in a 55-year-old Chinese man.