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Use "pigmentary" in a sentence
"Some children also experience retinal pigmentary (color) changes."
"Eye anomalies (cataract, developmental defects, and pigmentary changes of the retinal epithelium)"
"As I understand it, at least in some cases, the birthmarks become fragile, bleeding-prone areas, not just a pigmentary discoloration (especially in softer facial tissue like cheeks, rather than on a forehead)."