Lab Studies:
Evaluation for Relative Energy Deficiency in Sport included a complete blood count, comprehensive metabolic panel, thyroid-stimulating hormone, free thyroxine, free triiodothyronine, ferritin, iron studies, vitamin D level, and dual-energy x-ray absorptiometry scan.
Laboratory studies were overall unremarkable. Her vitamin D level was 23 ng/mL, which was within the laboratory reference range but below the treating team's preferred target for optimal bone health. A dual-energy x-ray absorptiometry scan obtained approximately 6 months after the injury demonstrated a lumbar spine Z-score of -1.0.
Other Studies:
Four-view radiographs of both knees demonstrated preserved joint spaces and normal bony cortices without fracture. No soft tissue swelling, loose bodies, or lateral patellar maltracking were identified. Case Photo #1 Case Photo #2 Case Photo #3
Magnetic resonance imaging of the right knee without contrast demonstrated intact menisci, cruciate ligaments, and articular cartilage. Low-grade popliteus tendinopathy and mild edema of the superolateral Hoffa fat pad were present. Case Photo #4 Case Photo #5
Magnetic resonance imaging also demonstrated a nondisplaced longitudinal stress fracture involving the proximal tibial metaphysis with associated stress reaction extending into the metadiaphysis. Case Photo #6 Case Photo #7 Case Photo #8
Consultations:
Sports Nutrition and Physical Therapy were consulted.
Given concern for Relative Energy Deficiency in Sport after the identification of a stress injury and a history of irregular menstrual cycles, nutritional evaluation was performed. Physical Therapy was consulted for gait retraining, hypermobility-specific strengthening, and return-to-running progression.
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