“…Two clinical variants of PR may be distinguished: a localized form, also known as Woringer-Kolopp disease (WKD), which consists of a single lesion, usually located on the extremities, presenting a good prognosis when it can be totally removed by excision or high-dose radiation, and the generalized type or Ketron-Goodman disease (KGD) with disseminated lesions and a poor prognosis [1, 2]. In the WHO and EORTC classification of cutaneous lymphomas in fact, WKD is classified as a relatively indolent variant of mycosis fungoides (MF), whereas KGD, which is not classified yet, is generally considered an aggressive lymphoma with bad prognosis similar to the aggressive CD8-positive cutaneous T-cell lymphoma, the cutaneous γ/δ-positive T-cell lymphoma and the tumor stage of MF [3]. …”