A case of cutaneous extranodal natural killer/T-cell lymphoma clinically and histopathologically mimicking interface dermatitis


Choi ME, et al. Australas J Dermatol 2020.


Extranodal natural killer/T-cell lymphoma (ENKTL) is a rare but aggressive cancer characterised by angiocentric and angiodestructive infiltration by NK-cells, or cytotoxic T-cell types. Histopathologically, ENKTL shows a multinodular or diffuse infiltration localised to vascular structures, resulting in angiodestruction and necrosis. We present a patient with an initially suspected diagnosis of benign interface dermatitis with a differential diagnosis of mycosis fungoides that was later found to

be an aggressive extranodal natural killer/T-cell lymphoma of a nasal type and with a dismal prognosis.