A man with knee pain after a fallBMJ 2017; 359 doi: https://doi.org/10.1136/bmj.j5053 (Published 16 November 2017) Cite this as: BMJ 2017;359:j5053
- Tobenna J Oputa, ST3 trauma and orthopaedics1,
- Ronnie Davies, ST8 trauma and orthopaedics2
- 1East Lancashire Hospitals NHS Trust, Royal Blackburn Hospital, UK
- 2Central Manchester University Hospitals, Manchester, UK
- Correspondence to T Oputa
A 47 year old man presented with a painful swollen right knee after a fall down stairs. On examination, his right knee was swollen, and there was infrapatellar tenderness, a palpable defect inferior to the patella, and a large effusion on palpation. He was unable to raise his leg or extend his knee. A radiograph of the knee was taken (fig 1). What sign can be seen on this radiograph and what diagnosis is it suggestive of?
Patella alta (high riding patella) suggestive of a patellar tendon rupture.
Patellar tendon rupture has an annual incidence of 0.68% …