title: Massive Preperitoneal Hematoma after a Subcutaneous Injection.
abstract: Preperitoneal hematomas are rare and can develop after surgery or trauma. A 74-year-old woman, receiving systemic anticoagulation, developed a massive preperitoneal hematoma after a subcutaneous injection of teriparatide using a 32-gauge, 4 mm needle. In this patient, there were two factors, the subcutaneous injection of teriparatide and systemic anticoagulation, associated with development of the hematoma. These two factors are especially significant, because they are widely used clinically. Although extremely rare, physicians must consider this potentially life-threatening complication after subcutaneous injections, especially in patients receiving anticoagulation.
authors.affiliation: Department of Surgery, Tokyo Bay Urayasu Ichikawa Medical Center, 3-4-32 Todaijima, Urayasu, Chiba 279-0001, Japan.
authors.forename: Hideki
authors.identifier: 0000-0002-2786-8569
authors.initials: H
authors.lastname: Katagiri
authors.affiliation: Department of Surgery, Tokyo Bay Urayasu Ichikawa Medical Center, 3-4-32 Todaijima, Urayasu, Chiba 279-0001, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yoshikawa
authors.affiliation: Department of Surgery, Jichi Medical University, 1-3311 Yakushiji, Shimotsuke, Tochigi 329-0498, Japan.
authors.forename: Alan Kawarai
authors.initials: AK
authors.lastname: Lefor
authors.affiliation: Department of Surgery, Tokyo Bay Urayasu Ichikawa Medical Center, 3-4-32 Todaijima, Urayasu, Chiba 279-0001, Japan.
authors.forename: Tadao
authors.initials: T
authors.lastname: Kubota
authors.affiliation: Department of Surgery, Tokyo Bay Urayasu Ichikawa Medical Center, 3-4-32 Todaijima, Urayasu, Chiba 279-0001, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Mizokami