title: Unicameral Bone Cyst in the Calcaneus of Mirror Image Twins.
abstract: Unicameral bone cysts (UBCs) are benign tumor-like lesions that commonly occur in the diaphyseal or metaphyseal region of the long bones within the first 2 decades of life. Until today, the pathogenesis of UBC has been unclear, but mechanisms such as vascular occlusion or a response to trauma have been supposed. During the past decade, in particular, the genetic aspects of the development of this rare lesion have been discussed. We present the first case of mirror image monozygotic twins with a mirror image UBC of the calcaneus. Our findings reinforce the importance of additional studies to understand the significance of cytogenetic factors in the etiology of UBC.
authors.affiliation: Resident, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany. Electronic address: Uli_Lenze@web.de.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Lenze
authors.affiliation: Registrar, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany.
authors.forename: Josef
authors.initials: J
authors.lastname: Stolberg-Stolberg
authors.affiliation: Resident, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Pohlig
authors.affiliation: Resident, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Lenze
authors.affiliation: Professor, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany.
authors.forename: Rüdiger
authors.initials: R
authors.lastname: von Eisenhart-Rothe
authors.affiliation: Professor, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany.
authors.forename: Hans
authors.initials: H
authors.lastname: Rechl
authors.affiliation: Surgeon, Department of Orthopedics and Orthopedic Sports Medicine, Klinikum rechts der Isar, Technische Universtät München, Munich, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Toepfer
mesh_terms: D001845:Bone Cysts / Q000175:diagnosis* / Q000601:surgery; D002111:Calcaneus / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D004200:Diseases in Twins / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D014430:Twins, Monozygotic; D055815:Young Adult
keywords: bone graft; bone tumor; foot; monozygotic twins; solitary bone cyst