Follicular spicules and multiple ulcers: cutaneous manifestations of multiple myeloma.

We describe 2 patients with multiple myeloma who had horn-like filiform spicules in the follicular orifices of the face, particularly on the nowe, and multiple small ulcerations on the trunk. In the first patient, histopathologic study of a specimen from the nose showed follicular plugs of compact homogeneous eosinophilic material filling the intercellular spaces surrounding the keratinocytes. The same eosinophilic deposits were seen in the ulcer. In the second patient, biochemical investigation revealed that skin matter from spicules and ulcers were made up of monoclonal dysprotein with electrophoretic characteristics identical to those found in patient serum.