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Michael E. Serjeant, MB, ChB
Oklahoma City, Okla

Arch Intern Med. 1991;151(11):2318.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor. —

Sundbeck et al¹ in their unsuccessful search for the causes of a low thyrotropin level in the elderly confined attention to the thyroid gland. A low thyrotropin level, however, is also a feature of panic disorder, where 22% of patients have been shown to have an undetectable level.² This could conceivably be linked to the concomitantly elevated level of epinephrine in this disease,^3,4 as its interactions with thyroid hormones have been extensively documented.⁵

Thus, the levels in question may have been secondary not to thyrotoxicosis, but to adrenotoxicosis. Studies of adrenal function might provide an answer to this interesting question. . . . [Full Text PDF of this Article]

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