NASAL TRAUMA INTRODUCTION
A septal haematoma may be an early sequel to injury. Blood extravasates into the plane between the cartilage and bone of the septum on the one hand, and the membrane lining that cartilage (mucoperichondrium) and bone (mucoperiosteum) on the other. The septal lining becomes converted into a bag of blood; in the worst cases two such bags resembling dark-coloured cherries hang out of the nostrils. Septal blockage is complete. If the haematoma is not drained the cartilage will lose its blood supply and die, and the external shape of the nose will then be altered by loss of support to the area above the tip, resulting in a saddle-nose deformity.