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May 1977

Radiation Dosage in Tinea Capitis

Author Affiliations

Tel-Hashomer, Israel

Arch Otolaryngol. 1977;103(5):311. doi:10.1001/archotol.1977.00780220105023

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To the Editor.—In his paper on "Radiation-Induced Salivary Gland Tumors," which appeared in the September issue of Archives (102:561-562, 1976), Dr Smith referred to our study of Israeli children irradiated for tinea capitis. He reported that these children received 1,750 to 2,000 rads to the head, which is not accurate. The children received 350 to 400 rads (according to age) to each of five different fields, and it is incorrect to multiply the radiation dose. In actuality, the borders of the field may have received radiation twice, and one might reasonably assume that there were some small areas of the scalp that received 700 to 800 rads. It should also be pointed out that owing to the position of the parotid gland, it received considerably less radiation than the scalp.

Recent dosimetric studies demonstrated that the actual parotid dosage ranged between 12.7 and 74.1 rads, depending on head and

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