ICD-11 classes
04 Diseases of the immune system
4B40 — Diseases of thymus
4B40.0 — Persistent hyperplasia of thymus

ICD-11 4B40.0 — Persistent hyperplasia of thymus

This refers to a persistent enlargement ("hyperplasia") of the thymus.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.