Hobnail Hemangioma Low-magnification view of a hobnail hemangioma (HH) demonstrates superficial dilated vascular spaces in the papillary dermis with deeper small blood vessels and stromal hemosiderin deposits .
Higher Magnification of Superficial HH Higher power examination of the superficial portion of an HH shows superficial dilated vessels lined by small endothelial cells with nuclear hyperchromasia protruding into the lumina .
Deeper Vessels and Hemosiderin Deposits in HH Histologic examination of the deeper aspect of the lesion shows small, thin-walled blood vessels and prominent hemosiderin deposition in the stroma .
More Cellular Example of HH This is an example of a more cellular HH composed of many closely apposed vessels in the superficial dermis, many of which show very small, compressed lumens . Hobnailed endothelial cells can be appreciated in some of the vessels .
in the papillary dermis with deeper small blood vessels and stromal hemosiderin deposits 
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and prominent hemosiderin deposition in the stroma 
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. Hobnailed endothelial cells can be appreciated in some of the vessels 
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