The association of a neuropathy and a paraproteinaemia such as Waldenström's macroglobulinaemia is frequent and not fortuitous. This paper reports a slowly progressive, predominantly sensory neuropathy, occurring in a 69-year-old man, as the first sign of a Waldenström's macroglobulinaemia. A saphenous [correction of sural] nerve biopsy revealed a mixed process of primary demyelination and axonal degeneration. ...