The region which includes the upper part of the front of the thigh and lower part of the abdomen. A deep groove runs obliquely across it, which corresponds to the inguinal ligament, and divides the thigh from the abdomen. The principal diseased conditions in this region are enlarged glands (see GLANDS), and HERNIA. Sportspeople may experience groin strain, the result of a tear or rupture to any one of the adductor muscles producing pain in the inner thigh.