thymoma type B1
Findings
No curated finding names thymoma type B1 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
A thymic epithelial neoplasm characterized by the presence of expanded areas which resemble the normal thymic cortex. The neoplastic epithelial cells are small and scant and there is a dense T-lymphocytic component present. Areas of medullary differentiation with or without Hassall's corpuscles are also present. It may be associated with myasthenia gravis, pure red cell aplasia, and hypogammaglobulinemia. It has a low grade malignant potential. The majority of cases occur in the anterior mediastinum as Masaoka stage I tumors. A minority of the cases occur as stage II tumors.
Definition from the Mondo Disease Ontology (MONDO:0006459), read 2026-09-29. CC BY 4.0.
Where it sits
- A kind of
Other names
4 names
Resolves to: thymoma type B1
- Also called
- lymphocyte-predominant thymomalymphocyte-rich thymomaorganoid thymomapredominantly cortical thymoma