Figure 1

Pedigree and TFTs. Square symbols indicate males, circles females. Results of thyroid function test are aligned with each symbol and were obtained on no hormonal replacement. Roman numerals to the left of the pedigree indicate the generation and numerals on the right of each symbol indicate individual family member. Abnormal values in bold, high in red and low in blue. Rx, treatment; Tx, thyroidectomy; ¹³¹I, radioactive iodine.