[Iodine concentration in the blood and urine in children depending on the goiter size]

Epidemiological investigations have shown that at the Białystok Province about 30% of children and youth is afflicted with goitre. In this area drinking water is poor in iodine and iodine supply with food is quite unsatisfactory. The purpose of the present work has been to check the behaviour of the serum and urine iodine in children with thyroid goitre. The estimations of I in blood serum were made in 126 children with goitre (I, II, and III, according to the WHO classification) and in 100 healthy children. The method used included buthanol extraction according to Fisher and Morris. The concentration of iodine and its excretion rate in urine were assessed in 119 children with goitre of various advancement, an; in 170 children not affected with goitre, using the method of Fisher and Morris adopted to urine analysis. The authors found the following values for serum protein bound iodine: control group 4.9 microgram/100 ml, at average; 4.3 microgram/100 ml, 3.0 microgram/100 ml, and 2.6 microgram/100 ml in those affected with I, II, and III of the goitre, respectively. The 24 hr urine excretion rate of iodine in healthy children amounted to 66.4 microgram, and 64.2 microgram, 53.6 microgram, and 4o.2 microgram in those with I, II, and III goitre, respectively. The above results indicate a significant decrease of iodine concentration in blood serum and in urine in children with goitre; this decrease has been found to be dependent on the degree of the thyroid gland enlargement. The differences were statistically significant.