Lymphoepithelial cyst of the thyroid mimicking malignancy on sonography.
A 52-year-old man presented with a palpable left neck mass that had been present for several months. A sonogram showed a 2-cm hypoechoic mass with internal coarse macrocalcifications in the left lobe of the thyroid gland. CT revealed a well-demarcated hypodense mass within the left thyroid lobe. A left thyroidectomy was performed at the patient's request because of the possibility of malignancy based on sonographic findings. Pathologically, the mass was composed of pseudostratified ciliated columnar epithelial cells simulating respiratory epithelium surrounded by florid lymphoid hyperplasia with germinal centers, consistent with an intrathyroidal lymphoepithelial cyst.
Kwak
Jin Young
JY
Department of Diagnostic Radiology, CHA General Hospital, College of Medicine, Pochon CHA University, Gangnam-ku, Seoul, Korea.
Kim
Eun-Kyung
EK
Jung
Hae-Kyoung
HK
Park
Hai-Lin
HL
Kim
Gwang Il
GI
D044963:Biopsy, Fine-Needle; D001935:Branchioma / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D014463:Ultrasonography