<prompt> ;Tennis elbow; is characterized byTenderness over the medial epicondyleTendinitis of common extensor originTendonitis of common flexer originPainful flexion and extension  <response>: .tennis elbowlateral epicondylitis characterised by pain and tenderness at the lateral epicondyle of the humerus due to non-specific inflammation of the origin of extensor muscle of the forearm. clinical features-tenderness ,precisely localized to the lateral epicondyle of the humerus.pain is aggravated by putting the extensor tendons to a stretch Ref: Essential ohopaedics, Maheshwari and Mhaskar,5th edition,pg no. 302 