Three-dimensional CT reconstruction-based applied anatomical study of the azygos lobe in the right upper pulmonary lobe
10.3969/j.issn.1671-8348.2025.03.016
- VernacularTitle:基于CT三维重建的右上肺奇叶应用解剖研究
- Author:
Hongyu CAO
1
;
Yingjiu JIANG
Author Information
1. 重庆医科大学,重庆 400016
- Keywords:
three-dimensional reconstruction;
azygos lobe;
anatomical structure;
right upper lobe vascu-lature
- From:
Chongqing Medicine
2025;54(3):646-651
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the anatomical characteristics of the azygos lobe in the right upper lung using three-dimensional CT reconstruction.Methods This retrospective study analyzed 92 patients diag-nosed with azygos lobe in the right upper lung through thin-section chest CT at the First Affiliated Hospital of Chongqing Medical University from March 2016 to March 2019.Three-dimensional reconstruction models were utilized to statistically analyze the trajectories of bronchi and vessels in the azygos lobe,and to evaluate the anatomical structures of the right upper lobe in these patients.Results According to the classification based on the origin of the azygos lobe bronchi and the number of lobar bronchi,the unibranched type was pre-dominant,accounting for 76.1%(70/92),with most azygos lobe bronchi originating from B1b or B1a.Regard-ing arterial origin classification,the unibranched type remained dominant at 72.8%(67/92),primarily origina-ting from A1a,followed by A1b and A1a.Most azygos lobe veins drained into V1a(68 cases,73.9%),while the remainder drained into V1b(24 cases,26.1%).There were six branching patterns of right upper lobe bronchi,with the trifurcated type(B1-B2-B3)being the most common anatomical configuration at 53.3%(49/92).The mean volume of the azygos lobe was(62 869.36±45 097.76)cm3,smaller than the average volume of other pulmonary segments.Patients with larger azygos lobe volumes generally had dual bronchial branches,with a mean volume of(120 421.41±25 294.04)cm3,whereas unibranched azygos lobes showed a mean volume of(43 685.34±31 697.77)cm3.Conclusion The pulmonary anatomical structure of the azygos lobe demon-strates and multitype variations in complexity,and may exhibit extremely rare anatomical variants.
