Purpose of this exhibit is: 1. Report a rare case of isolated avulsion fracture of the medial head of gastrocnemius during an exercise called the standing broad jump. 2. Explain the bio-mechanism of medial head of gastrocnemius injury in context of standing broad jump

Methods and materials: A 16 year male athlete developed acute severe pain and swelling along the medial and posteromedial aspect of the leftknee immediately after performing a standing broad jump. The patient was examined by a sports surgeon who suspected acute ACL and MCL partial tear/sprain, and a medial meniscal tear. Radiographs on the(L) knee were performed in two orthogonal views. Non-enhanced MRI ofleft knee was performed with following sequences. (1)Coronal T1W (2) Coronal Proton Density (PD)Fat Saturated (FS) (3)Sagittal PD thin slice 1.5 mm...

Results: The lateral radiograph of the leftknee reveals a 1.5cm curvilinearfracture fragment in the popiteal fossa, projectedalong the posterior aspect of the distal femoral metaphysis, approximately 1 cm away from the cortex and just above the physis (Figure 1). Another irregular osseous fragment is seenatsame location,closely related tothe posterior femoral metaphyseal cortex (Figure 1). The antero-posterior radiograph of the leftknee is unremarkable. MRI shows complete avulsion of the medialhead of gastrocnemius witha large bony fragment attached to theretracted tendon (Figure 2 and Figure 3).There is...

Isolated avulsion fracture of the medial head of gastrocnemius is extremely rare. It may result from combination of forcible planter flexion of the foot and extension of knee and external rotation of tibia during a standing broad jump.

Avulsion Fracture of the Medial Head of the Gastrocnemius Muscle –A case report. H Mahera and Y Sakaguchi. THE JOURNAL OF BONE & JOINT SURGERY · JBJS.ORG VOLUME 86-A · NUMBER 2 · FEBRUARY 2004 Isolated avulsion fracture at the medial head of the gastrocnemius muscle J T Patterson, P Jokl , L D. Katz, D A. Lawrence & E Smitaman Skeletal Radiol (2014) 43:1491–1494. Biomechanical analysis of the standing long jump WEN-LAN WU1, JIA-HROUNG WIT, HWAI-TING LIN\ GWO-JAW WANG4 BIOMEDICAL ENGINEERINGAPPLICATIONS, BASIS & COMMUNICATIONS...

First author and correspondence: Pravin Mundada Department of radiology. Changi General Hospital Singapore. email: [email protected] [email protected]