Follicular hyperkeratosis and cryocrystalglobulinemia syndrome. Occurrence in a patient with multiple myeloma

Follicular hyperkeratosis was observed in a patient with multiple myeloma. This keratosis is considered to be a cutaneous manifestation of multiple myeloma, since similar cases have been observed before. In addition, the patient had cutaneous, ocular, and articular signs and symptoms of cryocrystalglobulinemia, ie, cutaneous vasculitis, blurring, and joint swellings.