Bilateral adrenal metastasis: "head light" sign.

Metastatic lesions to the adrenal gland are usually silent, although their incidence is especially high in patients with carcinomas of the breast and lung, and melanoma. After reviewing the sonograms of over 50 patients with adrenal masses, 10 were found to have bilateral metastases. This has prompted us to describe the "head light" sign as an accurate method for diagnosing bilateral adrenal metastases.