Retiform Hemangioendothelioma at Low Magnification Low-magnification examination of a retiform hemangioendothelioma (RHE) shows superficial dermal involvement by irregular, elongated, branching vascular spaces .
Retiform Hemangioendothelioma at Higher Magnification Higher magnification view shows a proliferation of elongated vessels lined by hyperchromatic-staining hobnailed endothelial cells . The surrounding stroma shows fibrosis and scattered lymphocytes.
Retiform Hemangioendothelioma With Dense Lymphoid Aggregates A deep area of an RHE shows elongated vascular spaces surrounded by prominent lymphoid aggregates .
Retiform Hemangioendothelioma: Cytologic Features High-magnification view shows hyperchromatic endothelial cells with hobnail features, nuclear crowding , and focally enlarged nucleoli .
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. The surrounding stroma shows fibrosis and scattered lymphocytes.
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, and focally enlarged nucleoli 
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