Combined sphenoid and frontal sinus aplasia accompanied by bilateral maxillary sinus hypoplasia in a child with sinusitis

Paranasal sinus agenesis is unusual clinical condition. The frontal sinus agenesis is more frequently seen, whereas agenesis of sphenoid sinus is extremely rare. Agenesis of both frontal and sphenoid sinus is very unique. This case presents a 13-year-old child with combined sphenoid and frontal sinus agenesis accompanied by bilateral maxillary sinus hypoplasia with scoliosis and coccyx abnormality.