Congenital defect in the upper lip where the maxillary prominence fails to merge with the merged medial nasal prominences. It is thought to be caused by faulty migration of the mesoderm in the head region.
    

concept

K.Pearson, ed., Treasury of Human Inheritanc

Child welfare: Operation for hare lip & cleft palate

Plate LII. Surgical technique for nasal polypi and hare-lip.

Examples of hare-lip or congenital recesses of the lower lip, plate K in Treasury of Human Inheritance, edited by Karl Pearson, London, Dulau and Co, 1912

Dog (puppy) with cleft palate

Cleft-palate and hare-lip : the earlier operation on the palate / by Edmund Owen.

On harelip / by Francis Mason.

Cleft lip and palate in paleopathological material / Fred Gilkey.

On harelip and cleft palate.

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Cleft Lip

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Cleft-palate and hare-lip : the earlier operation on the palate / by Edmund Owen.

On harelip / by Francis Mason.

Cleft lip and palate in paleopathological material / Fred Gilkey.

K.Pearson, ed., Treasury of Human Inheritanc

On harelip and cleft palate.