title: A case of rapidly expanding and increasing focal nodular hyperplasia.
abstract: We report a case of 14-year-old male patient who underwent bile-duct-to-jejunum anastomosis because of congenital biliary atresia at the age of 2 months. A 15 mm hypervascular nodule was detected for the first time in the S1 region of the liver at the age of 9 years. Two years later, 6 hypervascular nodules were found in the liver. A tumor biopsy was performed. It was diagnosed as a focal nodular hyperplasia (FNH). However, the number of nodules increased from 6 to 12 and those diameters were enlarged two to seven times one year later; the tumor biopsy was performed again. Histologically, the findings were consistent with those obtained previously, which indicated FNH. We consider that this is a very rare case of FNH in which both the number of nodules and the size were increased in a short period of time. We present it here as a valuable case report.
authors.affiliation: Department of Internal Medicine II, Fukushima Medical University School of Medicine, Fukushima City 960-1295, Japan. a-satoh@fmu.ac.jp
authors.forename: Ai
authors.initials: A
authors.lastname: Sato
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Rai
authors.forename: Atsushi
authors.initials: A
authors.lastname: Takahashi
authors.forename: Hironobu
authors.initials: H
authors.lastname: Saito
authors.forename: Tadayuki
authors.initials: T
authors.lastname: Takagi
authors.forename: Goro
authors.initials: G
authors.lastname: Shibukawa
authors.forename: Takeru
authors.initials: T
authors.lastname: Wakatsuk
authors.forename: Yuta
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Irisawa
authors.forename: Kazuya
authors.initials: K
authors.lastname: Ise
authors.forename: Kazuo
authors.initials: K
authors.lastname: Watanabe
authors.forename: Mitsukazu
authors.initials: M
authors.lastname: Gotoh
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Ohira
mesh_terms: D000293:Adolescent; D020518:Focal Nodular Hyperplasia / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D014057:Tomography, X-Ray Computed