title: Sonographic appearances of juvenile fibroadenoma of the breast.
abstract: OBJECTIVE
  The purpose of this study was to evaluate characteristic features of juvenile fibroadenoma of the breast on sonography.
  
  
  METHODS
  Our study included 34 juvenile fibroadenomas confirmed by surgical biopsy or sonographically guided 8-gauge vacuum-assisted biopsy in 23 patients (age range, 15-47 years; mean age, 25 years). Sonographic findings of the lesions were analyzed retrospectively by 2 radiologists in consensus according to the American College of Radiology Breast Imaging Reporting and Data System (BI-RADS) lexicon. The BI-RADS final assessment category was also established.
  
  
  RESULTS
  On sonography, all fibroadenomas presented as masses. The mean size was 30 mm. Regarding shape, there were 29 oval, 2 round, and 3 irregular masses. The margins were circumscribed in 24, indistinct in 5, microlobulated in 4, and angular in 1. Regarding echogenicity, 16 masses were hypoechoic, 16 isoechoic, and 2 complex echoic. Posterior acoustic characteristics included posterior acoustic enhancement in 22 masses (65%), posterior shadowing in 1, and no posterior acoustic features in 9; this information was not available in 2. The lesion boundary presented as an abrupt interface in 32 and an echogenic halo in 2. The orientation was parallel in 32 and nonparallel in 2. Calcifications were present in 3 cases and absent in 31. On color Doppler sonography, the masses were usually hypervascular with vessel counts of 5 or more (87%). The BI-RADS final assessment categories were 3 in 24 and 4a in 10.
  
  
  CONCLUSIONS
  The dominant sonographic presentation of juvenile fibroadenoma is a circumscribed oval hypoechoic or isoechoic mass, which resembles that of simple fibroadenoma. Juvenile fibroadenomas frequently show posterior acoustic enhancement and hypervascularity on color Doppler sonography.
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Suk Jung
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea. pymrad@yahoo.co.kr.
authors.forename: Young Mi
authors.initials: YM
authors.lastname: Park
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Soo Jin
authors.initials: SJ
authors.lastname: Jung
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Kwang Hwi
authors.initials: KH
authors.lastname: Lee
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Ok Hwa
authors.initials: OH
authors.lastname: Kim
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Ji Hwa
authors.initials: JH
authors.lastname: Ryu
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Gi Bok
authors.initials: GB
authors.lastname: Choi
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Sun Joo
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Hye Jung
authors.initials: HJ
authors.lastname: Choo
authors.affiliation: Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea (S.J.K., K.H.L., O.H.K., J.H.R., G.B.C.); and Departments of Radiology (Y.M.P., S.J.L., H.J.C., H.W.J.) and Pathology (S.J.J.), Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
authors.forename: Hae Woong
authors.initials: HW
authors.lastname: Jeong
mesh_terms: D000293:Adolescent; D000328:Adult; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D018226:Fibroadenoma / Q000000981:diagnostic imaging*; D006801:Humans; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016217:Ultrasonography, Mammary / Q000379:methods*; D055815:Young Adult
keywords: breast; breast ultrasound; fibroadenoma; juvenile fibroadenoma; sonography