title: Osteochondroma of the Tibial Sesamoid: A Case Report and Review of the Literature.
abstract: Osteochondroma, one of the most common benign bone tumors, frequently occurs in the metaphysis of the long bones. We report an extremely rare case of osteochondroma that occurred in the tibial sesamoid. The patient was a 62-year-old Japanese male. He presented with a 1-year history of pain and a hard mass on the plantar aspect of the right forefoot sole. The osteochondroma protruded toward the sole from the tibial sesamoid, leading to pain on weightbearing. After tibial sesamoidectomy, the patient's symptoms were eliminated, and no pain or complications such as hallux valgus occurred after the surgery. Although a potential risk exists of postoperative hallux valgus deformity, tibial sesamoidectomy seems to be an appropriate surgical option for both osteochondroma and bizarre parosteal osteochondromatous proliferation to avoid residual pain or local recurrence.
authors.affiliation: Chief, Division of Foot and Ankle Surgery, Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan. Electronic address: ouchik@fmu.ac.jp.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Ouchi
authors.affiliation: Associate Professor, Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan.
authors.forename: Michiyuki
authors.initials: M
authors.lastname: Hakozaki
authors.affiliation: Chief Director and President, Fukushima Medical University, Fukushima, Japan.
authors.forename: Shin-Ichi
authors.initials: SI
authors.lastname: Kikuchi
authors.affiliation: Professor, Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan.
authors.forename: Shoji
authors.initials: S
authors.lastname: Yabuki
authors.affiliation: Professor and Chairman, Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan.
authors.forename: Shin-Ichi
authors.initials: SI
authors.lastname: Konno
mesh_terms: D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D015831:Osteochondroma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D012716:Sesamoid Bones / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery
keywords: bizarre parosteal osteochondromatous proliferation; osteochondroma; sesamoidectomy; tibial sesamoid