Abstract
The occurrence of rickets of varying degree in two small premature babies receiving a proprietary vitamin‐supplemented formula is described. The importance of thinning of the skull as an early clinical sign of rickets in infancy is emphasized. Periosteal thickening may also be an important early radiological sign of rickets in the premature. Possible alterations in the calcium and phosphate concentrations and in the fatty acid composition of the milk, which may improve calcium and phosphate absorption, are discussed. The need for additional vitamin D supplementation in the prevention of rickets in the small premature baby is also discussed.

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