[Case report: unusual clinical presentation of a follicular lymphoma].

Follicular lymphoma is an indolent B-cell lymphoma. Fluctuant asymptomatic lymphadenopathies are their usual clinical manifestation. B-cell neoplasms can sometimes involve the skin. In this case, it is important to distinguish a systemic B-cell lymphoma with secondary skin involvement from primary cutaneous lymphoma. Immunohistochemical stainings and staging usually allow to make the difference. Here we report the first case of a systemic follicular lymphoma with secondary cutaneous involvement presented with papular lesions on the face mimicking a rosacea.