A 72- year old man, presented to the Emergency Department with severe pain in his right elbow. He reported a mechanical fall at home on the stairs, when he grabbed the handrail with his right hand. No history of fever, syncope or any other injuries.

Observation- No external injury on the elbow No skin discolouration around the elbow Palpation- Small lump on the arm, proximal to the antecubital fossa Examination- Vital signs were normal Weak elbow flexion and supination Radiographs appeared normal What can be the probable diagnosis? *This patient case is from Docplexus Editorial Team for educative purpose only Source: Brady Pregerson, MD; Clinical Advisor,2018 Correct answer is published in the comment section ( click here ).