PMC5645202_01
Clinical zoster-like lesions along the T4 dermatome on the left chest wall.
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At the current visit, his physical examination showed localized, well-defined erythematous indurated large plaques with some vesicles, nodules, and crust along the left T4 dermatome on the anterolateral chest wall (Fig. 1).
a, Sheet of tumor cells with glandular formations in the dermis (H&E, original magnification x20). b, The tumor cells showing hyperchromatism and prominent nucleolus located within a dilated lymphatic vessel (H&E, original magnification x200).
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A sheet of tumor cells with variable glandular formations was seen in the dermis and within dilated lymphatic vessels (Fig. 2).
Immunohistochemistry studies showed the tumor cells were positive for TTF-1 and CK7 but negative for CK20.
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TTF-1, but negative for CK20 (Fig. 3). The patient was diagnosed with advanced adenocarcinoma of the lung with zosteriform metastasis.