Introduction:

Nasal-type extranodal natural killer/cytotoxic T-cell lymphoma is rare but has a high mortality rate. The clinical manifestations of the disease can mimic a paranasal sinus infection.

Objective:

To present the clinical manifestations of a 34-year-old patient diagnosed with nasal-type extranodal natural killer/cytotoxic T-cell lymphoma.

Clinical case:

A 34-year-old male patient with recurrent greenish fetid rhinorrhea and obstruction in the right nostril is presented. In the initial evaluation, it suggests chronic sinusitis, however, due to the worsening of the clinical manifestations, a computed tomography is performed that shows lesions suggestive of neoplastic infiltration, a biopsy of the lesion confirms the diagnosis of T-cell lymphoma/extranodal natural killer.

Conclusions:

Nasal-type extranodal natural killer/cytotoxic T-cell lymphomas are considered rare neoplasms characterized by a rapidly progressive pattern with bone involvement; in its initial stage it presents clinical manifestations similar to sinusitis. Computed tomography and histopathology are essential in the diagnosis of the disease.

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