Anaplastic carcinoma of the thyroid with chondroblastoma features mimicking papillary carcinoma: a case report.
BACKGROUND
An unusual case of anaplastic carcinoma of the thyroid arising from a metastatic focus of papillary carcinoma.


METHODS
The tumor affected a 69-year-old woman with a history of total thyroidectomy for papillary thyroid carcinoma 4 years previously. She presented with a rapidly enlarging neck mass that histologically simulated chondroblastoma. A small, embedded focus of residual follicular variant of papillary carcinoma was present. The patient died of disease 3 months later.


CONCLUSIONS
This "chondroblastoma" variant of anaplastic thyroid carcinoma has not been reported to date.
Cerilli
Lisa A
LA
Department of Pathology, University of New Mexico, Albuquerque, New Mexico 87131, USA. lcerilli@salud.unm.edu
Frable
William J
WJ
Spafford
Michael F
MF
D000368:Aged; D002114:Calcinosis; D002277:Carcinoma / Q000473:pathology*; D002291:Carcinoma, Papillary / Q000473:pathology*; D002804:Chondroblastoma / Q000473:pathology*; D017809:Fatal Outcome; D005260:Female; D015726:Giant Cells / Q000473:pathology; D006801:Humans; D007633:Keratins / Q000378:metabolism; D013964:Thyroid Neoplasms / Q000473:pathology*
D007633:Keratins