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Figure 2: Cytological diagnosis of lung nodules. (a) Primary lung adenocarcinoma. Tumor cells show acinar and glandular arrangement with hyperchromatic nuclei. (b) Primary lung squamous cell carcinoma. Tumor cells demonstrate pleomorphic nuclei with few dyskeratotic cells. (c) Primary lung small cell carcinoma. Tumor cells reveal fine chromatin pattern, nuclear crowding and molding, and tumor necrosis. (d) Granulomatous inflammation. The section reveals clusters of epithelioid histiocytes, scattered multinucleated giant cells, and inflammatory cells. All photos are taken from cellblock H and E preparations at ×20

Figure 2: Cytological diagnosis of lung nodules. (a) Primary lung adenocarcinoma. Tumor cells show acinar and glandular arrangement with hyperchromatic nuclei. (b) Primary lung squamous cell carcinoma. Tumor cells demonstrate pleomorphic nuclei with few dyskeratotic cells. (c) Primary lung small cell carcinoma. Tumor cells reveal fine chromatin pattern, nuclear crowding and molding, and tumor necrosis. (d) Granulomatous inflammation. The section reveals clusters of epithelioid histiocytes, scattered multinucleated giant cells, and inflammatory cells. All photos are taken from cellblock H and E preparations at ×20