Cutaneous reactions simulating erythema multiforme and Stevens Johnson syndrome due to occupational exposure to a plant-growth regulator.
BACKGROUND
In India, hydrogen cyanamide (Dormex) is a plant growth regulator used mainly for the bud-breaking of grapevines. The use of this chemical may result in severe cutaneous reactions simulating erythema multiforme (EM), Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN).


METHODS
Studies were conducted on four seasonal grapevine workers who developed severe cutaneous reactions following the unprotected use of Dormex (hydrogen cyanamide).


RESULTS
Two of the patients had EM-like skin lesions and the other two developed SJS-TEN-like skin lesions. A latent period of 5-7 days existed between the contact with the chemical and the development of the skin lesions. The histopathological picture was suggestive of EM. All the patients responded to systemic steroids and antihistamines.


CONCLUSIONS
Hydrogen cyanamide may act as a hapten, initiating cytotoxic immunological attack on keratinocytes, resulting in EM- and SJS-TEN-like clinical picture. Awareness regarding such severe cutaneous reactions due to the inappropriate handling of Dormex is required. The use of personal protection equipment while handling agricultural chemicals is essential.
Inamadar
Arun C
AC
Department of Dermatology, Venereology and Leprosy, BLDEA's SBMP Medical College, Hospital and Research Centre, Bijapur, Karnataka, India. aruninamadar@rediffmail.com
Palit
Aparna
A
D000293:Adolescent; D000328:Adult; D000383:Agriculture; D016573:Agrochemicals / Q000009:adverse effects*; D003484:Cyanamide / Q000009:adverse effects*; D009783:Dermatitis, Occupational / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004892:Erythema Multiforme / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D016273:Occupational Exposure / Q000009:adverse effects*; D010937:Plant Growth Regulators; D012872:Skin Diseases, Vesiculobullous / Q000139:chemically induced* / Q000175:diagnosis; D013262:Stevens-Johnson Syndrome / Q000175:diagnosis
D016573:Agrochemicals; D010937:Plant Growth Regulators; D003484:Cyanamide