Summary
Three cases of hare-lip and/or cleft palate occurring in both components in double-monsters in a symmetrical manner are recorded. One of the specimens shows unilateral hare-lip and cleft palate occurring on the near side of the two components, each mirror imaging the other in its individual asymmetry. This adduces additional evidence to the genetic factor in the etiology of these conditions.
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Ayer, A.A., Mariappa, D. Hare-lip and cleft palate in double-monsters. Proc. Indian Acad. Sci. 38, 153–156 (1953). https://doi.org/10.1007/BF03050683
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DOI: https://doi.org/10.1007/BF03050683