Primary Frontal Sinus Carcinoma Found after Injury. A Case Report.

Compared to the maxillary sinus, a carcinoma of the frontal sinus is very rare and difficult to detect early. We report a case of a frontal sinus carcinoma that was not diagnosed in the early stage. A 75-year-old male fell down in his home garden and bruised his forehead. He visited the Shimotsuga General Hospital complaining of swelling of the central part of the forehead. CT showed a defect of the frontal bone and an abnormal shadow of the left frontal sinus. A pathological examination was carried out using a specimen of the ulcer lesion of the forehead, and he was diagnosed with an inflammatory granulation tissue. Antibiotics were admitted for 3 weeks but without improvement. Then, an extranasal frontal sinusectomy was performed. The final pathological diagnosis was a squamous cell carcinoma. Radiotherapy was performed immediately, but unfortunately, he died of bronchopneumonia. Generally speaking, a frontal sinus carcinoma has a very poor prognosis. We emphasize that frontal sinus carcinomas have to be detected at an early stage, and treatment must be started immediately.