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FIG 4. Correlation of changes in brain and ventricular size with changes in TSH levels. The data formed two distinct groups. After treatment, TSH levels in the hyperthyroid patients either increased by a small amount or not at all. Although initially very high, TSH levels in the hypothyroid patients decreased to the normal range after treatment.
A, Low levels of TSH was correlated with reductions in brain size.
B, Low levels of TSH were correlated with increases in ventricular size.
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