Final answer:
The aggregates of neoplastic cells in the epidermis seen with mycosis fungoides are called Pautrier microabscesses, which are characteristic of this form of cutaneous T-cell lymphoma.
Step-by-step explanation:
The aggregates of neoplastic cells in the epidermis seen with mycosis fungoides are called Pautrier microabscesses. Mycosis fungoides is a type of cutaneous T-cell lymphoma, and Pautrier microabscesses are characteristic of this condition. These aggregates are collections of malignant T-cells seen in the epidermis. Unlike common fungal infections, which often affect the superficial layers of skin and are referred to as cutaneous mycoses, mycosis fungoides is not a traditional fungal infection but a cancer that presents systemic symptoms, including lesions on the skin.