title: Osteoid Osteoma of the Femoral Neck in Athletes: Two Case Reports Differentiating From Femoral Neck Stress Injuries.
abstract: The diagnosis of an intra-articular osteoid osteoma can be a challenging and lengthy process, with reports of delayed diagnosis of greater than 2 years. In the young, athletic patient with an atraumatic onset of groin pain, an overuse injury or muscle strain is the most likely etiology. However, an overuse injury of femoral neck stress fracture must be identified because of the potentially disastrous outcome of fracture completion. The similar clinical presentation of a femoral neck stress fracture and intra-articular osteoid osteoma of the femoral neck can further delay the diagnosis of the osteoid osteoma. In a patient with these differential diagnoses that do not improve with a period of nonweightbearing activity, a more intensive workup must ensue. The purpose of this case report is to describe the initial presentations, subsequent follow-up, and imaging findings leading to the diagnosis of osteoid osteoma as well as to differentiate an osteoid osteoma from femoral neck stress injuries.
authors.affiliation: William Beaumont Army Medical Center, Fort Bliss, Texas christopher.b.cordova.mil@mail.mil.
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Cordova
authors.affiliation: Moncrief Army Community Hospital, Columbia, South Carolina.
authors.forename: Scott C
authors.initials: SC
authors.lastname: Dembowski
authors.affiliation: Columbia University School of Medicine, New York, New York.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Johnson
authors.affiliation: William Beaumont Army Medical Center, Fort Bliss, Texas.
authors.forename: John J
authors.initials: JJ
authors.lastname: Combs
authors.affiliation: Keller Army Community Hospital, West Point, New York.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Svoboda
mesh_terms: D000293:Adolescent; D000328:Adult; D018771:Arthralgia / Q000209:etiology; D001265:Athletic Injuries / Q000000981:diagnostic imaging*; D012090:Cumulative Trauma Disorders / Q000000981:diagnostic imaging; D057210:Delayed Diagnosis; D003937:Diagnosis, Differential; D005265:Femoral Neck Fractures / Q000000981:diagnostic imaging*; D005266:Femoral Neoplasms / Q000000981:diagnostic imaging*; D015775:Fractures, Stress / Q000000981:diagnostic imaging*; D006119:Groin; D006801:Humans; D008297:Male; D010017:Osteoma, Osteoid / Q000000981:diagnostic imaging*
keywords: athletes; bone tumor; femoral neck stress fracture; osteoid osteoma