Development of Pityriasis Lichenoides in a Pediatric Patient with Mycosis Fungoides

A limited number of cases have been reported showing the togetherness of mycosis fungoides (MF) and pityriasis lichenoides (PL) which are two rare diseases. As we observed PL et varioliformis acuta development soon after MF in a pediatric patient, were reviewed the related cases in the literature and determined that relationship could be in four different possible ways: the clinical presentation of MF with PL-like lesions, coexistence of MF and PL lesions, PL’s pioneering role in MF and as observed in our case, the occurrence of PL in a patient followed-up with a diagnosis of MF. Considering this wide spectrum of the relationship between two diseases, their pathogenesis may be partly associated.