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Woman, 65-year-old, with sensory-motor polyneuropathy for 15 years, worsening in the\nprevious 6 months. The patient had diffuse hyperpigmentation, dry skin and hemangiomas\n( and ). She reported hypertrichosis, edema of the legs, facial lipoatrophy,\nleukonychia and weight loss ( and ). Analytically, she presented polyglobulia,\nthrombocytosis, hypotestosteronemia, hyperalbuminemia and elevation of IgG in the\nliquor. The immunochemical study emphasized IgG monoclonal gammopathy of lambda\nchains.\nInvestigations showed small adenopathies, cardiomegaly, hepatosplenomegaly, generalized\nedema and extensive lytic lesion of L5. A biopsy of this lesion showed a lytic\nproliferation of plasma cells, CD138 +, К chains - chains λ +. The myelogram showed\nhypercellularity and eosinophilia. The electromyogram showed slowing of motor and\nsensory nerve conduction of several nerves. An excision of the right breast angioma was\nperformed and was compatible with capillary hemangioma. The patient has begun treatment\nwith dexamethasone, radiotherapy, bortezomib and is waiting for a bone marrow\ntransplant.