A STUDY OF SACROCOCCYGEAL TERATOMAS IN FETUSES, NEONATES & ADULTS IN CORRELATION WITH EMBRYOLOGICAL CONCEPT T.V.Ramani * 1 , S. Saritha 2 , D. Nagajyothi 3 ,  Gayathri.P 4  , N.Himabindu 5 . 1, 3, 4 Assistant professor, Department of Anatomy, KAMS & RC, Hyderabad, Telangana, India. 2  Professor& H.O.D, Department of Anatomy, KAMS & RC, Hyderabad, Telangana, India. 5  Lecturer, Department of Anatomy, KAMS & RC, Hyderabad, Telangana, India. Address      for      Correspondence:      Dr.      T.V.      Ramani.      Assistant      professor      of      Anatomy,      KAMS&RC,      Hyderabad,      Telangana,      India.      E-Mail:   ramani_muddaloor@hotmail.co.uk ABSTRACT: Introduction :   The   Sacrococcygeal   Teratomas   (SCTs)   are   rare   and   most   common   congenital   neoplasms   in   neonates,   but   rare   in   adults.   Usual   presentation   is, a   mass   in   the   sacrococcygeal   region   at   the   time   of   birth   and   arise   from   the   caudal   end   of   the   spine,   displacing   the   anal   canal   anteriorly.   The   SCT   results   in multiplication of totipotent cells of Henson’s node (primitive node) which fails to involutes at the end of the embryonic period. Materials   and   Methods:   We   report   three   cases,   with   clinical   manifestations   &   imaging   aspects.   The   first   case   was   an   abortuses   of   12   weeks   old   with   SCT diagnosed   by   Ultrasonography,   second   was   a   female   neonate   1   day   old   with   huge   SCT   and   third   case   was   24   years   old   female   diagnosed   as   sacral   tumor   by MRI report. Conclusion :   The   antenatal   and   proper   management   is   carried   out   after   baby   is   born.   It   can   be   diagnosed   by   prenatal   sonography,   if   necessary   MRI   during pregnancy   to   avoid   unnecessary   complications.   In   adult,   SCTs   are   diagnosed   with   abdomino-pelvic   ultrasound   scan.   In   this   article   a   brief   review   of   literature and embryological correlation has been presented. KEY WORDS: Sacrococcygeal Teratomas (SCTs), Ultrasonography, MRI. References 1 . Willis RA. 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