title: Solitary necrotic nodule of the liver.
abstract: Solitary necrotic nodule of the liver is a rare benign lesion; only 22 cases have been reported to date. An unsolved problem in treating these lesions involves the difficulties in differential diagnosis; specific features of necrotic nodule of the liver in preoperative examinations have not been identified. Here, we report a patient with resected solitary necrotic nodule of the liver with preoperative features shown on ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) examinations. A 48-year-old woman was referred to our hospital on December 13, 1999 because a hypoechoic lesion in Couinaud's segment VIII of the liver had been incidentally detected on US. A CT scan confirmed the presence of a round hypodense lesion, measuring 2 cm in diameter. No significant enhancement was recognized on dynamic MRI study. T1-Weighted MRI examinations demonstrated a low intensity showing a triple-layered pattern with low-iso-low intensity in the lesion, while T2-weighted images demonstrated a slightly high intensity in the lesion. These features suggested fibrous tissue. Histological examinations following partial resection of the liver revealed a solitary necrotic nodule of the liver. Combination studies, including MRI examinations, would be useful for the preoperative diagnosis of a solitary necrotic nodule of the liver.
authors.affiliation: Department of Surgery, Rinku General Medical Center, Izumisano Municipal Hospital, 2-23, Rinku Orai-Kita, Izumisano, Osaka 598-8577, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Iwase
authors.forename: Jun
authors.initials: J
authors.lastname: Higaki
authors.forename: Hyung-Eun
authors.initials: HE
authors.lastname: Yoon
authors.forename: Shoki
authors.initials: S
authors.lastname: Mikata
authors.forename: Minoru
authors.initials: M
authors.lastname: Miyazaki
authors.forename: Kei
authors.initials: K
authors.lastname: Torikai
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Shirai
authors.forename: Kazuo
authors.initials: K
authors.lastname: Awai
authors.forename: Masami
authors.initials: M
authors.lastname: Imakita
authors.forename: Wataru
authors.initials: W
authors.lastname: Kamiike
mesh_terms: D005260:Female; D006498:Hepatectomy; D006801:Humans; D008107:Liver Diseases / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009336:Necrosis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography