Abstract
Objective Sinonasal non-Hodgkin lymphoma (NHL) is a very rare condition. NHL located specifically
in the frontal sinus is even rarer with only 14 cases in the literature reported to
date. A unique case of diffuse large B-cell lymphoma of the frontal sinus that presented
first and was treated as suspected Pott puffy tumor is presented along with a review
of the literature.
Case Report A 69-year-old white man with a history of sinusitis and two recent endoscopic sinus
surgeries presented with enlargement of his right forehead. Computed tomography and
magnetic resonance images revealed a dense opacification of the frontal sinus bilaterally,
thickening and enhancement of the dura mater behind the right frontal sinus, and local
osteomyelitis-like lytic bone changes. A bifrontal craniotomy was performed. Radical
exoneration of the frontal sinus, copious antibiotic-impregnated irrigation after
culture swabs, and resection of presumed granulation tissue was performed. Culture
swabs remained negative, but histopathology revealed diffuse large B-cell lymphoma.
Subsequent chemotherapy was administered.
Conclusion Sinonasal NHL is very rare but can occur in the frontal sinus and may present as
a suspected Pott puffy tumor. A high clinical suspicion is necessary for early diagnosis
and treatment.
Keywords
diffuse large B-cell lymphoma - frontal sinus - case report - Pott puffy tumor