Autologous serum therapy is effective in a significant proportion of ASST (+) patients with CU. A smaller but still substantial number of ASST (-) patients also benefited from this treatment.
Our study revealed higher prevalence of footwear and medicament dermatitis in comparison to existing data. Allergy to antiseptics is significant in our patients. Further collaborative studies involving patients from other parts of India are required to have an overall view of ACD in India.
100 consecutive cases of contact depigmentation due to bindi during a period of 11 months were studied. Bindi adhesive material was found to contain 80% para-tertiary-butylphenol (PTBP), by thin-layer chromatography, infrared spectrophotometry and high-pressure liquid chromatography. The possibility of hypersensitivity to PTBP was ruled out as none of the 15 patients tested with 2% PTBP and 1% para-tertiary-butylphenol-formaldehyde resin gave any positive reactions. Development of depigmentation could have been due either to individual susceptibility or to constant use for a prolonged period. The area of contact being very small, generalised vitiligo as a result of systemic absorption appeared to be a remote possibility.
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