Objective:

To analyze image features of multi-slice spiral CT of intrapulmonary lymph node (IPLN).

Methods:

The imaging and clinical data of 36 patients with IPLNs diagnosed by postoperative pathology were retrospectively analyzed. Non-enhanced CT scan of lymph nodules was performed before operation. The two doctors analyzed various imaging features such as the location

number

and size of the IPLNs.

Results:

In total

42 IPLNs were discovered in 36 cases by multi-slice spiral CT examination

with an avera

ge diameter of (6.522.01) mm. Most of the IPLNs were located below the tracheal carina (85.7%)

21 IPLNs (50.0%) were closely attached to the sub-pleura and 21 IPLNs (50.0%) were occurred in the sub-pleural area

with an average vertical distance between lesions and adjacent pleura of 3.44.56 mm. Most of the IPLNs showed clear boundaries

which were mostly round like (42.8%) or triangular (38.1%). The mean CT value of all IPLNs were (42.30119.33) HU

41 IPLNs were solid density

1 node was ground glass density

3 nodes with calcification and 3 nodes with vacuoles in solid density nodes. A number of uniform and compact linear shadows were seen around 40 IPLNs

and vascular bundle signs were visible at the edges of the 3 nodes. There were no satellite foci

burrs

pleural involvement

burrs

and bronchial truncation signs in all IPLNs.

Conclusion:

The image features of IPLNs represent some common characteristics

such as the location and shape of the lymph nodes in the lungs and the surrounding uniform and compact linear shadows

learning about these futures will contribute to avoid unnecessary surgery.