In recent years, the distinction between idiopathic follicular mucinosis (FM) and lymphoma-associated follicular mucinosis (LAFM) has been made through assessment of T-cell receptor gene rearrangement, flow cytometry, and immunohistochemistry. These methods, among others, have mostly identified monoclonality as a defining characteristic of LAFM; however, this finding cannot be considered conclu...

Those who support the connective tissue origin will further dividemucinousnevi into 2histopathologic types: a connective tissuenevusof theproteoglycan (CTNP) typeandcombinedepidermal-CTNPtype.1 InCTNP, theepidermis isnormal, while in epidermal-CTNP, the epidermis shows hyperkeratosis and acanthosis with elongation of the rete ridges consistentwithanepidermalnevus.1Regardlessof classification, t...

Bela Tamasi1, Noemi Mihalik1, Judit Dohan2, Tibor Kovacs3, Judit Harsing1, Bernadett Hidvegi1, Marta Marschalko1, Sarolta Karpati1, Peter Hollo1 1Semmelweis University, Budapest, Hungary, Department of Dermatology, Dermatooncology and Venereology. 2Semmelweis University, Budapest, Hungary, Department of Ophthalmology. 3Semmelweis University, Budapest, Hungary, Department of Neurology. Correspon...