A Review of Carcinomas Arising in the Head and Neck Region in HIV-Positive Patients
Figure 6
(a) Low-power view of Merkel cell carcinoma arising in a transplant patient. Note the hypercellular proliferation of small blue cells within the dermis (H&E stain, 40x magnification). (b) A cytokeratin stain (CAM5.2) demonstrating strong diffuse cytoplasmic staining (400x magnification). (c) Perinuclear positivity is seen with cytokeratin 20 (400x magnification). (d) Synaptophysin demonstrates diffuse cytoplasmic staining.
