title: Massive deposition and accumulation of hydroxyapatite crystal after total hip arthroplasty: a case report.
abstract: We presented a case in which massive hydroxyapatite accumulation was observed around the artificial hip joint. A 66-year-old female showed a massive accumulation of fluid in and around the hip joint, and milk-like aspirate was obtained. Her aspirate culture was negative, and sediment analysis by X-ray diffraction showed that its component was hydroxyapatite. Since pain was mild, the patient was treated conservatively. To our knowledge, this is the first case in which liquid hydroxyapatite (milk of calcium) was accumulated around the artificial hip joint.
authors.affiliation: Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Yamada
authors.forename: Koji
authors.initials: K
authors.lastname: Nozaka
authors.forename: Hidetomo
authors.initials: H
authors.lastname: Saito
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kijima
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tazawa
authors.forename: Yasusi
authors.initials: Y
authors.lastname: Takasaki
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Shimada