(rēd'ĕl )

Ger. surgeon, 1846–1916.

R. lobe An anomalous tonguelike extension from the right lobe of the liver to the gallbladder.

R. struma Riedel thyroiditis.

R. thyroiditis A rare form of thyroiditis characterized by fibrotic destruction of the thyroid gland . The fibrotic tissue extends beyond the capsule of the gland into the surrounding structures of the neck and may develop sufficiently to compress the trachea. The cause is unknown. SYN: fibrous thyroiditis; Riedel struma.