Chordoma is a rare tumor arising from the remnant of primitive notochord. Peak incidence is in the 5th -- 6th decades with a Male:Female ratio of 2:1. Usually it arises in the clivus (35%) and in the sacrococcygeal spine (53%), at the two ends of the notochord. Histologically, it consists of physaliphorous cells containing intracellular mucin. It is slow growing and locally osteodestructive.
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