20Developmental anomalies Structural developmental anomalies primarily affecting one body system Structural developmental anomalies of the liver, biliary tract, pancreas or spleen LB22Structural developmental anomalies of spleen
LB22.1
category
Polysplenia
Definition A condition caused by the development of supernumerary spleens during the antenatal period. This condition may present with cardiac defects, anomalies in abdominal organs, or may be asymptomatic.
Also indexed as
Accessory spleen Polysplenia Splenunculi Supernumerary spleen
Nearby in Structural developmental anomalies of spleen
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
About · Data & methodology ·
Privacy · Contact