Bilateral Nasosinusian Chondroblastoma: Case Study and Literature Review

Chondroblastoma is a rare benign bone tumor, craniofacial localization is rarely reported in the literature. It accounts for 2 to 7% of all chondroblastomas. We report a case of nasosinusian chondroblastoma with bilateral involvement of the ethmoidal, sphenoidal and maxillary sinuses without lysis of the bones of the skull base. It was a 45-year-old patient, a housewife, who consulted us for a bilateral nasal obstruction with a clinical history dating back about six years, marked by a left unilateral nasal obstruction of progressive onset and permanent evolution, which bilateralized four months later. Other associated signs are bilateral rhinorrhea, anosmia, closed rhinolalia, and headache. Physical examination revealed swelling of the left cheek, regular, fixed, hard and painless contours. An endonasal mass completely obstructed both nasal cavities with a bulge of the palate. Maxillofacial CT revealed a bilateral, ethmoid and sphenoidal maxillary nasosinus mass of tissue density, osteolytic, containing lump-like calcifications of irregular outline. The surgical treatment, performed transpalatally in combination with the endonasal route, removed the entire mass. Histology concluded that there was a bilateral nasosinusian chondroblastoma. No recurrence after one year. Conclusion: Chondroblastoma is a rare tumor and its location in the head is extremely rare, difficult to detect at an early stage. Surgical excision is the therapeutic principle.