Background: A rare multi-organ involvement in plasma-cell dyscrasias h
as been named POEMS-syndrome: it is a synopsis of monoclonal gammopath
y (M-gradient), osteosclerotic bone lesions. peripheral polyneuropathy
, organomegaly, endocrinopathy and skin lesions. Case Report: A patien
t is presented who had a classical manifestation of this disease known
mainly in Japan. A monoclonal IgA-lambda-gammopathy was determined as
cause of a gradually progressive polyneuropathy. The patient had a hy
pergonadotropic hypogonadism, hyperprolactinaemia, and sclerotic bone
lesions. In addition, he showed a changing organomegaly, and hyperpigm
entation of the skin. Conclusion: As yet, aetiology and pathophysiolog
y are not fully understood. Irradiation or surgical resection of one o
r several osteosclerotic bone lesions may prove the polyneuropathy or
may even lead to a complete remission of all symptoms. Thus, monoclona
l immunoglobulins should be searched for in any unclear polyneuropathy
, as should be for other symptoms of the POEMS-syndrome.