title: Postnatal sellar spine growth: A case report and literature review.
abstract: BACKGROUND
  A sellar spine is a bony spur protruding anteriorly from the central portion of the dorsum sellae. Its etiology is an ossified notochordal remnant of the cephalic end of the notochord. It is presumed to be a congenital malformation based on magnetic resonance imaging (MRI) findings of sellar spine in a 4-year-old boy. A sellar spine should therefore be detectable at birth with or without ossification, and the posterior pituitary lobe should be displaced.
  
  
  RESULTS
  Here we review the literature and report the first case of typical sellar spine in an 8-year-old girl who presented with precocious puberty, but her MRI taken at age 4 months for a febrile convulsion did not show a sellar spine or posterior pituitary lobe deformation. T1-weighted sagittal images at 8 years old showed a bony structure protruding anteriorly from the central portion of the dorsum sellae. The length of this lesion was 3.8 mm on computed tomography (CT) scanning at 9 years old, and it elongated to 4.7 mm on CT at 12 years old.
  
  
  CONCLUSIONS
  Based on the present case, we speculate that the sellar spine would be too small to detect early in development and would grow in size after birth. In this case, a sellar spine and precocious puberty were potentially associated due to deformation of the growing pituitary gland.
authors.affiliation: Department of Radiology, Saitama Children's Medical Center, Saitama Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo Department of Neurosurgery, Saitama Children's Medical Center, Saitama, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Hosokawa
authors.forename: Yoshitake
authors.initials: Y
authors.lastname: Yamada
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Sato
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Tanami
authors.forename: Jun
authors.initials: J
authors.lastname: Kurihara
authors.forename: Eiji
authors.initials: E
authors.lastname: Oguma
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010902:Pituitary Gland / Q000254:growth & development / Q000473:pathology; D011629:Puberty, Precocious / Q000473:pathology; D012658:Sella Turcica / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000254:growth & development