Sinonasal chondromyxoid fibroma: A rare tumour

Chondromyxoid fibroma (CMF) is a relatively rare benign bone neoplasm. CMF of the sinonasal tract is very rare. A 30-year-old male presented with nasal obstruction, right nasal mass with headache since two months. A Computed Tomographyscan showed locally aggressive hypodense, mildly enhancing lesion of size 10.3 cm x 5 cm x 5.1 cm involving right maxillary, ethmoid and frontal sinus with extension into premaxillary area and infratemporal fossa of the same side and into the nasopahrynx. Histopathology of biopsy revealed inflammatory polyp. The patient underwent a right medial maxillectomy with ethmoidectomy with excision of whole of the mass by lateral rhinotomy approach. A histological examination showed stellate cells in a chondromyxoid background with mitotic figures. It was provisionally diagnosed as Chondroblastic osteosarcoma. Immunohistochemistry confirmed the diagnosis of Chondromyxoid fibroma.