Malignant neoplasms of thymus

**Definition:** Primary malignant neoplasm involving the thymus. This category includes malignant thymomas, primary thymic carcinomas and carcinoid tumour or other neuroendocrine neoplasms of thymus.

**Exclusions:** - Malignant mesenchymal neoplasms - Malignant neoplasm metastasis in thymus gland