“…18 However, diagnostic challenges may ensue as normal thyroid cells were seen cytologically while thyroidectomy disclosed metastatic RCC. 1, 3,6,17,20 RCC immunoprofile on cytology supporting pancreatic and thyroid metastases includes positive CD10, vimentin, PAX-8, EMA, RCC and beta-catenin (cytoplasmic/membranous), and negative cytokeratin (CK)7, CK20, CK AE1/ AE3, CEA, synaptophysin, CD56, chromogranin, HMB45, thyroglobulin, TTF1, and calcitonin. 2 metastasis resection may provide survival benefit by hemithyroidectomy and isthmectomy.…”