Posterior Knee Mass; Is It A Tumor? - Page #1
 

Author: Michael Kulju, MD
Co Author #1: Christopher Jordan, MD, ATC
Editor: Christopher Miller, MD
Senior Editor: Christopher Miller, MD
Editor: Margaret Gibson, MD
Senior Editor: Margaret E Gibson, MD

Patient Presentation:
An otherwise healthy 14-year-old female cross-country runner presented with posterior left leg pain. The pain had been ongoing for three months prior to presentation. The discomfort had not caused any reduction in performance. There was no inciting trauma, change in training, or increase in mileage about the onset of pain. There were no associated radicular symptoms, no mechanical symptoms, no anterior knee pain, and no hip pain. No prior issues with this knee.

Physical Exam:
Left knee: On inspection there was minimal fullness over the lateral aspect of the popliteal fossa. Full active and passive range of motion without pain or crepitus. Grossly ligamentously stable with some mild tenderness to palpation over the area of fullness posteriorly. Full strength with knee flexion/extension

Left hip: Full range of motion without pain

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