Chromosomal studies in diabetic patients treated with chlorpropamide.

Chromosome studies were carried out on the peripheral blood of nine diabetic patients treated with chlorpropamide, on nine healthy controls and on nine untreated diabetic controls. Data from each treated individual were compared with the mean of the pooled data from the two control groups. There was a statistically significant increase in the individual numbers of sister chromatid exchanges per metaphase in each of the patients treated with the drug compared with the mean of the pooled control values.

Chromosomal studies of peripheral blood from epileptic patients treated with phenobarbital and/or diphenylhydantoin.

Chromosome studies were carried out on the peripheral blood of 26 epilepsy patients treated with phenobarbital and/or diphenylhydantoin, on ten healthy controls and on eight untreated epileptic controls. There was a significant increase in the individual numbers of sister chromatid exchanges per metaphase for all the patients treated with drugs compared with the mean of the pooled values from all the controls. There was no significant increase in the number of chromosome aberrations in the treated patients compared with the controls.

Prenatal diagnosis of lethal osteogenesis imperfecta (OI) by ultrasonography.

Ultrasonography was performed during the second trimester (17 weeks) in a pregnancy at risk for osteogenesis imperfecta congenita (OI). The scan showed that the femur was short, bent and dense. Radiologic examination of the fetus after interruption of pregnancy showed typical X-ray changes of OI.