title: Organized hematoma developed after suboccipital craniectomy.
abstract: An organized hematoma shows a heterogeneous signal intensity on T1-and T2-weighted images on MR imaging, reflecting variable stages of hemorrhage. Although rather nonspecific, precontrast CT images of an organized hematoma demonstrate inhomogeneous hyperdense mass with or without calcification. We report a case of an organized hematoma in a 44-year-old man, which developed 5 years after decompressive suboccipital craniectomy following acute cerebellar infarction. To our best knowledge, there has been no report describing organized hematoma in the suboccipital craniectomy site. Computed tomography and magnetic resonance imaging findings of the organized hematoma are shown and discussed. We believe that recognition of the characteristic imaging findings of the organized hematoma as well as consideration of the history of surgery or anticoagulation treatment assists in its correct diagnosis enabling an inappropriate surgery to be avoided.
authors.affiliation: Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.
authors.forename: Hee-Dong
authors.initials: HD
authors.lastname: Chae
authors.affiliation: Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.
authors.forename: Seung Hong
authors.initials: SH
authors.lastname: Choi
authors.affiliation: Department of Pathology, Seoul National University Hospital, Seoul, Korea.
authors.forename: Sung-Hye
authors.initials: SH
authors.lastname: Park
authors.affiliation: Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea.
authors.forename: Hee-Won
authors.initials: HW
authors.lastname: Jung
authors.affiliation: Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.
authors.forename: Tae-Jin
authors.initials: TJ
authors.lastname: Yun
authors.affiliation: Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.
authors.forename: Ji-Hoon
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.
authors.forename: Chul-Ho
authors.initials: CH
authors.lastname: Sohn
mesh_terms: D000328:Adult; D056424:Decompressive Craniectomy / Q000009:adverse effects*; D046648:Hematoma, Subdural, Intracranial / Q000175:diagnosis* / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D009777:Occipital Bone / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016896:Treatment Outcome
keywords: Hematoma; cranial; cranial fossa; epidural; posterior; postoperative hemorrhage