Mycosis fungoides

**Definition:** A peripheral (mature) T-cell lymphoma presenting in the skin with patches/plaques or less commonly with tumours or erythroderma. It is characterised by epidermal and dermal infiltration of small to medium-sized T-cells with cerebriform nuclei.

**Inclusions:** - Folliculotropic mycosis fungoides - Pagetoid reticulosis - Granulomatous slack skin