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(A) An involuting IH on the arm of a toddler. Note the graying red color when compared to the proliferating IH. (B) Histology: involuting IHs have fewer cells and organized vascular tubular structures (black arrowheads).
Note: Magnification of image B, 40×; scale bar =50 µm.
Abbreviation: IH, infantile hemangioma.
