Objective:

To explore the diagnostic value and diagnostic accuracy of 64-slice spiral CT on lymph node metastasis of gastric cancer

and provide theoretical reference for clinical diagnosis and treatment.

Methods:

A total of 82 cases of

gastric cancer patients admitted to Minhang Hospital

Fudan University from Jan. 2016 to Oct. 2018 and their imaging data were selected for study. 64-slice spiral CT was used for examination

and the postoperative pathological examination results were taken as the gold standard. The length

short diameter

short/long diameter of metastatic and non-metastatic lymph nodes were compared

as well as the values of plain

arterial

portal

and equilibrium phases. CT examination results and surgical pathological results were compared to analyze the CT scan and postoperative pathological N stages.

Results:

Among the 82 patients

60 had lymph node metastasis and 22 had no lymph node metastasis. During the operation

574 lymph nodes were removed

including 401 metastatic lymph nodes and 173 non-metastatic lymph nodes. The values of short diameter

short diameter/long diameter of metastatic lymph nodes and the values of scan stage

arterial stage

portal vein stage and equilibrium stage were all greater than those of non-metastatic lymph nodes

and the difference was statistically significant (

P

＜0.05)

while the difference in length diameter was not statistically significant (

P

＞ 0.05). The CT diagnostic coincidence rate was 84.15% (69/82)

specificity 81.25% (13/16)

and sensitivity 84.85% (56/66)

and the difference was not statistically significant (

P

＞0.05). Compared with postoperative pathological N staging

CT diagnosis accuracy of N

0

stage was 79.41% (27/34)

N

1

stage 75.00% (6/8)

N

2

stage 76.92% (10/13)

N

3a

stage 81.25% (13/16)

N

3b

stage 72.72% (8/11)

and total accuracy 78.05% (64/82).

Conclusion:

64-slice spiral CT is of high diagnostic value in the diagnosis and examination of lymph node metastasis of gastric cancer.