title: Skin reactivity to dinitrochlorobenzene in cancer patients.
abstract: Delayed skin hypersensitivity to DNCB was evaluated in 179 patients with cancer and in 71 control subjects. Cancer patients had a lower incidence of positive reactions than controls (50.2 vs. 84.5%, p less than 0.001). Incidence of impaired skin reactions in cancer patients varied according to the tumor type. Reactivity was most depressed in patients with lymphatic tumors (23.3% positive results) and least depressed in those with male genitourinary cancer (64.3% positive results). The number of positive results was significantly higher in cancer patients with localized tumor than in those with disseminated disease (60.2% vs. 44.1%, p less than 0.05). DNCB reactivity correlated well with the subsequent course of disease. Incidence of positive results in patients who had remained free of disease after 12 months of follow-up (64.3%) was significantly higher than in patients who had progressive disease (33.3%) or who died of disease (44.8%).
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004137:Dinitrochlorobenzene / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000276:immunology*; D009578:Nitrobenzenes / Q000276:immunology*; D012867:Skin / Q000276:immunology*
chemical_list: D004137:Dinitrochlorobenzene; D009578:Nitrobenzenes