The classification of cutaneous lymphomas is multidisciplinary and requires the
correlation between clinical, histopathological, immunohistochemical, and
molecular diagnostic elements. In this article, we present four different cases
of CD30-positive T-cell lymphoma with cutaneous manifestations. We compare cases
with definitive diagnosis of papulosis lymphomatoid type C, primary cutaneous
anaplastic large T-cell lymphoma, systemic anaplastic large T-cell lymphoma with
secondary skin involvement, and mycosis fungoides with large cell
transformation, highlighting the importance of clinicopathological correlation
to classify these cases.