We describe two cases of papillary carcinoma of the thyroid containing prominent nodular, fasciitis-like stroma. In one of the cases infiltration into the adjacent parathyroid gland and metastases to two cervical lymph nodes occurred. In the lymph nodes and the parathyroid gland the carcinoma grew without any fasciitis-like stroma. This unusual change in tumour stroma seems to be reactive in nature and confined only to the thyroid and adjacent soft tissues.

Department of Pathology Dobrany Czechoslovakia

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Papillary thyroid carcinoma with prominent myofibroblastic stromal component: clinicopathologic, immunohistochemical and next-generation sequencing study of seven cases