Congenital anomaly of vertebral region of back	Disorder of sacrum	Ischiopagus
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Pygopagus (disorder)
	Pygopagus
	Buttock-joined twins
	pygopagus

Id	70642007
Status	Defined

Associated morphology	Congenital abnormal fusion
Finding site	Structure of sacral vertebral column region
Occurrence	Congenital
Pathological process	Pathological developmental process

Associated morphology	Congenital abnormal fusion
Finding site	Fetal structure
Occurrence	Congenital
Pathological process	Pathological developmental process

Associated morphology	Double structure
Finding site	Fetal structure
Occurrence	Congenital
Pathological process	Pathological developmental process

ICD-10 complex map reference set

Target	Q89.4
Rule	TRUE
Advice	ALWAYS Q89.4
Correlation	SNOMED CT source code to target map code correlation not specified