Correct! Epithelioreticular cells (aka: thymic epithelial cells, TECs) surround developing T-lymphocytes (known as thymocytes). Together both cells types make up the thymic stroma.

Thymic epithelial cells (TECs) in the cortex have 4 important functions:

Thymic epithelial cells surround differentiating thymocytes (T-lymphoblasts) in the cortex. Lymphoblasts are considered a component of: