We encountered a patient with a blood boil in the maxillary sinus, and observed the time-course of its development by MRI. The patient was a 70-year-old woman with a chief complaint of right epistaxis.
Comparison of MM images obtained three times in 5 years showed that the mass had enlarged. Since imaging findings suggested a malignantt umor, we performed a biopsy, which revealed a mass of clotted blood. fter removal of the mass under general anesthesia, histopathological examination demonstrated a hematoma, but no neoplastic lesions.
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