Acardius amorphus

Last revised by Alexandra Stanislavsky on 15 May 2019

Acardius amorphus is a morphologic subtype of the acardiac twin in a twin reversed arterial perfusion (TRAP) sequence.  This entity is the least well differentiated of the four subtypes, comprising of an amorphus mass with no recognizable structures. It is seen in approximately 20% of cases.

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