RT Journal Article SR Electronic T1 Concurrent papillary and medullary thyroid carcinomas with mixed metastases to lymph nodes JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 373 OP 375 VO 25 IS 3 A1 Meshikhes, Abdul-Wahed N. A1 Tingura, Mukund A1 Al-Saeed, Jamal Y. YR 2004 UL http://smj.org.sa/content/25/3/373.abstract AB We report here a rare concurrence of medullary and papillary carcinomas of the thyroid in a 39-year-old Saudi male. He presented with a solitary nodule of the right thyroid lobe and underwent total thyroidectomy based on the cytological diagnosis of papillary carcinoma. Subsequent detailed histopathologic examination of the thyroid revealed 2 different types of malignancies in the 2 lobes papillary cancer in the right and medullary cancer in the left lobe. A single small lymph node showed metastatic replacement by both cancers. The extreme rarity and the interesting pathological features of such combinations are discussed.