title: Young man with persistent calf pain.
authors.affiliation: *United States Air Force,720th Operations Support Squadron,Hurlburt Field,FL.
authors.forename: Regan F
authors.initials: RF
authors.lastname: Lyon
authors.affiliation: †United States Air Force,Emergency Department,San Antonio Military Medical Center,San Antonio,TX.
authors.forename: Kristen
authors.initials: K
authors.lastname: Kann
mesh_terms: D000306:Adrenal Cortex Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000628:therapy; D000328:Adult; D001707:Biopsy, Needle; D059248:Chemoradiotherapy / Q000379:methods; D059350:Chronic Pain / Q000175:diagnosis / Q000209:etiology; D018450:Disease Progression; D006801:Humans; D007150:Immunohistochemistry; D007866:Leg / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D064847:Multimodal Imaging / Q000379:methods*; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging / Q000503:physiopathology; D011379:Prognosis; D012512:Sarcoma, Ewing / Q000000981:diagnostic imaging / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000473:pathology / Q000556:secondary* / Q000628:therapy; D014057:Tomography, X-Ray Computed / Q000379:methods; D018608:Ultrasonography, Doppler / Q000379:methods