This roentgenogram (x-ray) depicts an anteroposterior (AP) view of the lower extremities of a 3-day-old infant, who had been born with skeletal abnormalities, due to a case of congenital rubella, having been born to a mother ill with the disease while pregnant. Note the skeletal demineralization, and cartilaginous irregularities surrounding the metaphyseal regions both knee joints, which is typical in cases of congenital rubella. The round shape in the center of each knee represents the patella, or kneecap. The image is courtesy of Aaron Rausen, MD, from Pediatrics Journal, Vol. 36, p. 264, 1965.