title: Radiation dewlap.
abstract: A dewlap is a hanging fold of skin under the throat of oxen and dogs. A similar swelling sometimes occurs in man after radiation therapy. The incidence and natural history of this 'radiation dewlap' has been assessed in patients receiving radiotherapy to malignant growths in the head and neck region. The appearance of this complication has been correlated with the age of the patient, the site and stage of the tumour and the type of radiation employed. The aetiology and significance of the complication are discussed with reference to the anatomy and physiology of the affected tissues and the physical characteristics of the radiotherapy administered. Possible methods of prevention are suggested.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D006258:Head and Neck Neoplasms / Q000473:pathology / Q000532:radiotherapy*; D006801:Humans; D008208:Lymphatic System / Q000528:radiation effects; D008875:Middle Aged; D009333:Neck / Q000528:radiation effects*; D009367:Neoplasm Staging; D012867:Skin / Q000528:radiation effects*