Solve exciting clinical cases specific to your field of interest via Docplexus` Clinical Case Challenge . In today's ‘Orthopedics Case Challenge’ , join your fellow doctors to discuss and answer this question. An 18-year-old boy was playing football when he suddenly twisted his knee on the ankle and fell down.

He got up after ten minutes and started playing again. However, his knee was swollen the next morning and he was unable to move it. Source: Orthopedics and Traumatology