Korakrit Khomarwut, Watoo Sutthisast, Urarat Vasuntaraporn, Olarn Arpornchayanon
2019 The Bangkok Medical Journal  
P atell cubiti is a patella-like sesamoid bone in the triceps brachii tendon. 1 Its etiology is unknown and theories include congenital, developmental or traumatic injury. Normal radiography shows an ossicle projected posterior to the elbow joint. This case study aims to increase the awareness about the existence of patella cubiti. Case report A 39 year-old-man with acute left elbow pain after a motor vehicle accident was admitted. At presentation, he was found to have swelling and tenderness
more » ... the distal third of the caudal aspect of the left elbow. Examination revealed tenderness with a palpable gap at the triceps brachii tendon insertion, proximal to the olecranon. The triceps brachii tendon of the left elbow joint had full function and full range of motion. Radiography of both elbows showed a smooth well-corticated ossicle projected posterior to the elbow joints on lateral views. There was a proximal migration of the left ossicle when compared to the right one. There was associated mild soft tissue swelling at the posterior aspect of the left elbow joint (Figure 1 ). Findings suggested ruptured triceps brachii tendons insertion of the left elbow. The right elbow showed no radiology or clinical abnormality (Figure 2 ). Because the elbow function was not limited, conservative treatment including rest and oral analgesics were administered. However, he did not present for a follow up. No other investigations, including MRI or ultrasound, were performed. Discussion Patella cubiti is a rare anomaly of the elbow, which can be unilateral or bilateral. It is a sesamoid bone in the triceps brachii tendon. 1, 2 The other accessory bones around the elbow are fabellae cubiti (bilateral antecubital ossicles) and the medial or lateral epicondyle. 3 tella cubiti may be asymptomatic or can cause symptoms including limitation of motion, stiffness or pain. Some patients are diagnosed incidentally following a trauma. 4 Most patients described in literature are male. Since males are more likely to have injuries and have more radiology studies of the elbow after injuries to this area, the difference in gender may not be significant. 2
doi:10.31524/bkkmedj.2019.02.015 fatcat:cksi54mra5gyjnri62jetqlteu