Author: A/Prof Patrick Emanuel, Dermatopathologist, Auckland, New Zealand, 2014.
Cutaneous lymphadenoma is a folliculartumour that presents as a small dermalpapule. They are regarded by many authors as a form of trichoblastoma.
Histology of lymphadenoma
In cutaneous lymphadenoma, there is a well circumscribeddermal mass composed of large tumour islands. The surrounding stroma is fibrotic and is intimately connected to the epithelial islands (figures 1, 2). The islands are infiltrated by impressive populations of lymphocytes (figures 1–3). There is peripheral palisading surrounding the basaloid follicular cells which make up the tumour islands.