title: Benign intranodal thyroid tissue mimicking nodal metastasis in a patient with papillary thyroid carcinoma: A case report.
abstract: A case of benign intranodal thyroid tissue mimicking nodal metastasis on ultrasound and CT in a patient with papillary thyroid carcinoma has not been reported.
  
  
  
  The clinical, imaging, and histopathological findings of the patient are presented. A 52-year-old woman who underwent ultrasound-guided fine-needle aspiration for 2 small, suspicious thyroid nodules in both lobes at a local clinic was referred to our hospital for surgical treatment. Ultrasound-guided fine-needle aspiration for a suspicious lymph node in the left upper neck was performed. According to the imaging and cytology results, total thyroidectomy and nodal dissection for both central and left lateral nodes were performed.
  
  
  
  In the histopathology, the lymph node was confirmed as a benign lymph node with intranodal thyroid tissue.
  
  
  
  This case illustrates that benign intranodal thyroid tissue may mimic nodal metastasis on ultrasound or CT in a patient with papillary thyroid carcinoma.
authors.affiliation: Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Yoo Jin
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Dong Wook
authors.initials: DW
authors.lastname: Kim
authors.affiliation: Department of General Surgery, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Ha Kyoung
authors.initials: HK
authors.lastname: Park
authors.affiliation: Department of General Surgery, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Tae Kwun
authors.initials: TK
authors.lastname: Ha
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Do Hun
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Department of Pathology, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Soo Jin
authors.initials: SJ
authors.lastname: Jung
authors.affiliation: Department of Nuclear Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Sang Kyun
authors.initials: SK
authors.lastname: Bae
mesh_terms: D044963:Biopsy, Fine-Needle / Q000379:methods; D002277:Carcinoma / Q000175:diagnosis* / Q000556:secondary / Q000601:surgery; D002291:Carcinoma, Papillary; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D061705:Image-Guided Biopsy; D007150:Immunohistochemistry; D008197:Lymph Node Excision / Q000379:methods; D008198:Lymph Nodes / Q000473:pathology* / Q000601:surgery; D008207:Lymphatic Metastasis; D008875:Middle Aged; D018570:Risk Assessment; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000175:diagnosis* / Q000556:secondary / Q000601:surgery; D016606:Thyroid Nodule / Q000473:pathology*; D013965:Thyroidectomy / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler
keywords: CT; lymph node; metastasis; papillary thyroid carcinoma; ultrasound