Mark Wai Wah Lai - The Hong Kong Institute of Musculoskeletal Medicine, Hong Kong
Regina Wing Shan Sit - Jockey Club School of Public Health and Primary Care, The Faculty Medicine, The Chinese University of Hong Kong, Hong Kong

Lateral Ankle sprain (LAS) is a common sports injury associated with recurrent ankle sprain, chronic ankle instability(CAI) and post-traumatic ankle osteoarthritis (PTOA). Platelet Rich Plasma (PRP) has been increasingly used forherapeutic applications in sports-related injuries, and is thought to stimulate tissue healing. We reported a case ofLAS with complete tear of anterior talofibular ligament, which showed complete healing of ligament and early anklestabilization after PRP. The healing is supported by dynamic ultrasound images and magnetic resonance imaging.We therefore proposed that PRP may serve as an alternative non-surgical treatment option in LAS in future research,with the potential to prevent the development of CAI and PTOA.

Anterior talofibular ligament tear, Case reports, Lateral ankle sprain, Platelet rich plasma, Ultrasound