Nasosinus organizing hematoma at Chiang Mai University Hospital

Organizing hematoma is a rare pathological lesion which usually presents with symptoms and signs which mimic those of tumors of the nose and paranasal sinuses, so the diagnosis is usually done by pathological study after biopsy or surgical removal. Most patients usually need multiple biopsies before getting the final pathological diagnosis. In our hospital, if the clinical presentations and initial tissue biopsy is negative for malignancy, only CT scan is enough for investigation preoperatively. The CT characteristics, which consistent with organizing hematoma are encapsulated slowly expansile mass with scattered areas of well-demarcated patchy and nodular contrast enhancement within the mass, with no surrounding soft tissue infiltration. This lesion can be treated by endoscopic approach or combination with minimal open approach, with good results and no serious complications.