Most patients typically present with a non-painful, rapidly growing thyroid mass often associated with airway obstruction, dysphonia, hoarseness, hypoparathyroidism, dysphagia, or stridor.
Physical examination reveals a large goiter with a hard or woody texture. At the time of presentation, approximately one third of patients present with extracervical manifestations of multifocal fibrosis, including retroperitoneal, mediastinal, pulmonary or lacrimal gland fibrosis, orbital pseudotumor, sclerosing cholangitis, or fibrosing parotitis.
E06.5 – Other chronic thyroiditis
89024000 – Riedel's thyroiditis