Spindle Epithelial Tumor with Thymus-Like Differentiation Tumor, also known as spindle epithelial tumour with thymus-like differentiation tumour, is related to nasal cavity benign neoplasm and mature teratoma. An important gene associated with Spindle Epithelial Tumor with Thymus-Like Differentiation Tumor is TG (Thyroglobulin). Affiliated tissues include thymus and thyroid, and related phenotype is immune system.