Summative Diagnosis:
Cardiac defects: Heterotaxy with complex congenital heart diseases such as transposition of the great arteries (TGA) and atrioventricular septal defect (AVSD)
Fyler Codes
The Fyler code developed by The Boston Children's Heart Foundation in Boston Children's Hospital provides a hierarchical clinical diagnosis of congenital cardiovascular defects and other disorders. These codes are used to delineate pathology in the mutant mouse models that parallel human disease and can be cross referenced to the International Pediatric and Congenital Cardiac Code (IPCCC) (http://www.ipccc.net/).

Fyler Code ID	Code Description
0190	Heterotaxy Syndrome
0700	D-loop transposition of the great arteries
1100	Atrioventricular canal (endocardial cushion defect)
3804	Congenital heart disease