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DISCUSSION
M. DELPLA: I wonder what reliance can be placed in the doses you
report, because [ do not believe that 1000 rads, or even 1500, would have been
enough to suppress the hormonal activity of the thyroid gland of two children
contaminated when they were one year old. In fact, to obtain such a result,
doctors have to administer a dose of !31I giving at least 100 000 rad. It is true
that this applies to adults, but all the same the dose difference appears considerable.
R.A. CONARD: There are uncertainties in the thyroid dose estimates in
the Marshallese, particularly in the children. I agree it would seem likely that
the two boys who developed myxoedemareceived higher doses than those
estimated to produce atrophyof the thyroid gland.
K. SHIMAOKA: The normal humanthyroid is radioresistant as far as
thyroid function is concerned; patients with head and neck tumourstreated by