A 60-year-old male patient has developed linear erythematous vesicular eruptions on the anterior neck and chest where had been assigned to mark for local radiation therapy of malignant parotid tumor with Castellanis paint due to its reddish staininin...
A 60-year-old male patient has developed linear erythematous vesicular eruptions on the anterior neck and chest where had been assigned to mark for local radiation therapy of malignant parotid tumor with Castellanis paint due to its reddish stainining property 3 days ago. He showed positive reactions to Castellanis paint as is and its component 5% resorcinol in patch test and we concluded that he has got a allergic contact dermatitis due to resorcinol. We reported this article for further recognition of potential allergic reaction of Castellanis paint using as marking solution as regarding recent rapid increase of cancer patient necessitating radiotherapy in spite of rarity of allergic reaction of resorcinol.