Quantitative sensory testing demonstrates that subclinical sensory neuropathy is prevalent in patients with cancer
R. B. Lipton, B. S. Galer, J. P. Dutcher, R. K. Portenoy, A. Berger, J. C. Arezzo, M. Mizruchi, P. H. Wiernik and H. H. Schaumburg
Vibration threshold (VT) determinations were used to assess the function of
the large nerve-fiber sensory system in 171 patients with cancer and 58
healthy subjects. Significant differences in VT indicate dysfunction of
this sensory system in the cancer group. Twelve percent of the cancer
patients had elevated VT compared with 1.7% of control subjects. Elevated
VT was not associated with risk factors for neuropathy such as diabetes,
renal disease, poor nutrition, or treatment with chemotherapy. Although VT
elevation was associated with alcoholism and increasing age, these
variables accounted for only a small proportion of the variance in VT.
These data suggest that VT determinations are a useful method for
quantifying sensory abnormalities in cancer patients. Sensory abnormalities
occur in a significant proportion of patients with cancer and seem to be
related directly to the neoplasm, rather than to known risk factors for
neuropathy.