Fig. 7
From: Thyroid metastasis from small cell lung carcinoma: a case report and review of the literature
Oil immersion, high power (×1000 magnification) Diff-Quick staining of thyroid fine-needle aspiration biopsy. Small cell carcinoma cells are characterized by hyperchromatic nuclei, coarse chromatin, salt and pepper appearance, high nuclear to cytoplasmic ratio and nuclear membrane irregularities. No thyroid follicular cells are seen. Small cell carcinoma cells are much larger than thyroid follicular cells