JOTWANI, V. and K. G. HARMON. Postconcussion syndrome in athletes. Curr. Sports Med. Rep., Vol. 9, No. 1, pp. 21-26, 2010. Postconcussion syndrome (PCS) is a constellation of physical, cognitive, and emotional symptoms that persist in a small percentage of patients who suffer from a concussion. There is significant debate regarding the definition and pathophysiology of PCS. This article reviews these controversies, the factors that may predict PCS, potential diagnostic and treatment options, and return-to-activity considerations for the sports medicine physician.