Figure 3From: Successful desensitization with human insulin in a patient with an insulin allergy and hypersensitivity to protamine: a case report Histologic slide of a skin biopsy obtained from an allergic skin reaction on the injection site: regular epidermis; congestion of different inflammatory cells in blood vessels with emission in the adjacent connective tissue of deeper dermal parts. Hematoxylin/eosin staining, magnification ×200; inset: Giemsa staining, magnification ×200.Back to article page