SEVERAL cases of the syndrome of infantile cortical hyperostosis have been reported since Caffey and Silverman<sup>1</sup>first described this heretofore unknown disease of infants. Smyth, Potter and Silverman<sup>2</sup>were among the early workers to add to the rapidly growing number of cases. These were followed with reports by Whipple,<sup>3</sup>Dickson and his associates,<sup>4</sup>Shuman<sup>5</sup>and Gipson and Clark<sup>6</sup>and from the Children's Hospital, Washington, D. C.<sup>7</sup>The purpose of this report is to present 2 additional cases of this syndrome and to discuss some variable aspects of the disease. <h3>REPORT OF CASES</h3> Case1.—M. A. F., a 5 month old Italian infant, was admitted to the babies' wards of the New York Post-Graduate Hospital on Nov. 11, 1947 because of a facial swelling since 2 weeks of age. <i>Family History</i>.—The parents were living and in good health. There were no known familial