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lines of Blaschko

Pronunciation: blahs'ko

Definition: a pattern of distribution of skin lesions or pigmentary anomalies; linear on the extremities, S-shaped curves on the abdomen, and V-shaped on the back; thought to result from genetic mosaicism (q.v.) and the interplay of transverse clonal proliferation and longitudinal growth and flexion of the embryo.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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