title: [The combination of ultrasound and CT evaluate lymph node metastasis of thyroid papillary carcinoma in different compartments].
abstract: OBJECTIVE
  To evaluate the role of the combination of ultrasound and enhanced CT in analyzing lymph node metastasis in thyroid papillary carcinoma (PTC) patients by compartment.
  
  
  METHODS
  Clinical data of 115 cases (141 sides) with PTC were collected. All had undergone ultrasound in neck and enhanced CT both in neck and in mediastinum before surgery. They were divided into ultrasound group. CT group, and the combination of ultrasound and enhanced CT group to evaluate lymph node metastasis.
  
  
  RESULTS
  For the central compartment, the accuracy of ultrasound was 61.0%. CT was 48.9%, and the combination of ultrasound and CT was 62.4%. For the lateral compartment, ultrasound was 87.9%, CT was 78.7%, the combination of ultrasound and CT was 85.8%. Ultrasound had higher accuracy than CT in the central (P < 0.05) and lateral (P < 0.05) compartment. The combination of ultrasound and CT had higher accuracy than CT in the central compartment (P < 0.05), but there was no significant difference in the lateral compartment (P > 0.05). There was no significant difference in accuracy between ultrasound and the combination of ultrasound and CT neither in central (P > 0.05) nor in lateral (P > 0.05) compartment. Six cases of lymph node metastasis in mediastinum and 1 case in parapharyngeal space detected by CT were pathologically proven. CT found that five patients with pulmonary metastasis.
  
  
  CONCLUSIONS
  The combination of ultrasound and CT or single ultrasound has higher accuracy in preoperative evaluation than single CT for lymph node metastasis in PTC. CT can assess some compartments such as mediastinum which can't be detected by ultrasound, and at the same time to evaluate lung metastasis. To evaluate lymph node metastasis in PTC, the combination of ultrasound and CT is more accurate and considerate than single method.
authors.forename: Ganxun
authors.initials: G
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.forename: Junlan
authors.initials: J
authors.lastname: Hu
authors.forename: Ruili
authors.initials: R
authors.lastname: Zhao
authors.forename: Junheng
authors.initials: J
authors.lastname: Ge
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zhanlong
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000000981:diagnostic imaging* / Q000473:pathology; D002291:Carcinoma, Papillary; D002648:Child; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed; D018615:Ultrasonography, Doppler, Color; D055815:Young Adult