title: Periarticular osteoid osteoma of the ankle: a report of nine arthroscopically treated patients.
abstract: Periarticular osteoid osteoma often presents with unspecific clinical symptoms, mimicking other clinical conditions. This can lead a clinician to a ''diagnostic side path'' and a delayed or missed diagnosis compared with extra-articular osteoid osteoma. We report the cases of 9 patients with a mean age of 22 (range 14 to 32) years who were diagnosed with periarticular osteoid osteoma of the ankle and were surgically treated in our department during a 12-year period. The diagnostic difficulties associated with periarticular osteoid osteoma must be resolved by obtaining a detailed patient history and performing a thorough physical examination. Computed tomography is the ultimate imaging method to confirm the suspicion of osteoid osteoma. Arthroscopic removal of the osteoid osteoma was performed in all 9 patients in the present case series, with synovectomy performed when indicated. Under arthroscopic visualization, a specimen was obtained for histopathologic analysis to confirm the diagnosis, followed by tumor excision. All the patients were pain free at the final follow-up visit after a mean duration of 6 years (range 6 months to 12.7 years) postoperatively. We suggest arthroscopic removal of periarticular osteoid osteomas of the ankle as an effective treatment method, because it allows complete tumor excision, synovectomy when needed, a short postoperative rehabilitation period, and satisfactory functional results.
authors.affiliation: Department of Orthopedic Surgery, University Hospital Centre Zagreb and University of Zagreb School of Medicine, Zagreb, Croatia. Electronic address: ddimnjak@gmail.com.
authors.forename: Damjan
authors.initials: D
authors.lastname: Dimnjaković
authors.affiliation: Department of Orthopedic Surgery, University Hospital Centre Zagreb and University of Zagreb School of Medicine, Zagreb, Croatia.
authors.forename: Ivan
authors.initials: I
authors.lastname: Bojanić
authors.affiliation: Department of Orthopedic Surgery, University Hospital Centre Zagreb and University of Zagreb School of Medicine, Zagreb, Croatia.
authors.forename: Tomislav
authors.initials: T
authors.lastname: Smoljanović
authors.affiliation: Department of Orthopedic Surgery, University Hospital Centre Zagreb and University of Zagreb School of Medicine, Zagreb, Croatia.
authors.forename: Alan
authors.initials: A
authors.lastname: Mahnik
mesh_terms: D000293:Adolescent; D000328:Adult; D000843:Ankle Joint / Q000601:surgery*; D001182:Arthroscopy; D001859:Bone Neoplasms / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D010017:Osteoma, Osteoid / Q000601:surgery*; D055815:Young Adult
keywords: ankle; arthroscopy; osteoblastic tumor; surgery; talus; tibia