Surgical Pathology Criteria

Microscopic Thymoma / Nodular Hyperplasia of Thymic Epithelium

Differential Diagnosis

Micronodular Thymoma with Lymphoid Stroma Microscopic Thymoma / Nodular Hyperplasia of Thymic Epithelium
Gross tumor mass Incidental microscopic finding
Epithelial nodules surrounded by lymphocytes Small epithelial nodule(s) surrounded by normal thymus or fat

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