Butterfly vertebra: look for Alagille's syndrome.
Maillefert
J F
JF
Saggio
D
D
Hillon
P
P
Tavernier
C
C
D000328:Adult; D016738:Alagille Syndrome / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011859:Radiography; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging*