Recurrent fibrosarcoma of maxillary sinus involving the cranial base: A rare case.

Adult fibrosarcoma (FS) of the maxillary sinus and the cranial base is a rare soft tissue sarcoma which is clinically characterized by a high frequency of local repeated recurrence if not excised widely. At present, the standard treatment option for FS is surgical resection. Here, we report a case of a 46-year-old male with a 5 months history recurrent FS of the maxillary sinus. The patient possessed an enormous mass in the right maxillofacial region extending to the cranial base, as observed by computed tomography. Histologically, the lessions were composed of hypercellular cells with heterogenous groups. The recurrence and pathologically heterogenous groups of FS lead to therapeutic complexities. Due to the challenging anatomy in head and neck region, it is crucial to define the lesion areas and weigh the balance between life quality and functional reconstruction.