Plasmacytosis

Plasmacytosis is a condition in which there is an unusually large proportion of plasma cells in tissues, exudates, or blood. Plasmacytosis may be divided into two types—cutaneous and systemic—both of which have identical skin findings. Patients with plasmacytosis have been predominantly found to have lung infections (pneumonia, tuberculosis, abscess) whereas multiple myeloma is rarely found.