“…Certain authors have suggested that the paraprotein should be considered as essential for the diagnosis (Hill, Crawford & Rogers, 1976) but there are several reports of clinically typical cases were no paraprotein has been detected (Rudner, Mehregan & Pinkus, 1966;Rowell, Waite & Scott, 1969;Tay & Khoo, 1970;Howsden, Herndon & Freeman, 1975;Jessen, Straight & Becker, 1978). Some cases have responded favourably to cytotoxic therapy (Feldman et al, 1969, Wright et al, 1976, which suggests that the paraprotein is of some aetiological importance, but the cases that responded were not always the ones with associated gammopathies (Howsden et al, 1975;Jessen et al, 1978). One case of lichen myxoedematosus showed spontaneous resolution despite the persistence of the paraprotein (Hardie et al, 1979).…”