Abbott Specimen 6
Specimen Card Nomenclature
Supernumerary (fourth) coronary cusp and patent ductus arteriosus
International Classification of Diseases
Quadricuspid pulmonary valve
Atlas Illustration
None
Donor
Dr. Klotz
Date
1909
Age
Three-and-a-half months
Description
The specimen shows an opened right ventricle with the pulmonary valve above. The latter has four instead of the normal three cusps. A blue rod is seen in a patent ductus arteriosus.
Comment
Supernumerary valve leaflets (typically a quadricuspid pulmonary valve as in this case) occur rarely (0.001 to 0.003 live births) and are usually unassociated with symptoms or complications.