Introduction:
The lungs are essential respiratory organs divided into lobes by the horizontal and oblique fissures. The mediastinal surface of each lung consists of the hilum which allows the bronchus, pulmonary vein, and pulmonary artery to enter and exit. This study aims to investigate and record the variations in the morphology of lung fissures, lobes, and hilar patterns observed in a South African sample.
Methods and Materials:
This was a cross-sectional observational study with a descriptive analysis. A total of 48 formalin-fixed bodies comprising females (n = 24) and males (n = 24) from the Department of Human Biology at the University of Cape Town were studied. The fissures were classified according to the Craig and Walker criteria. Permission to conduct the study was given by the Cadaveric Research Governance Committee: CRGC 2023/006.
Results and Discussion
The Craig and Walker classification was used to describe the frequencies of variations observed in the study. 25 right sided and 30 left sided lungs had incomplete oblique fissures. Incomplete horizontal fissures were observed in 39 right lungs. One right lung had both an absent horizontal and oblique fissure. Accessory fissures were found in five right and 7 left lungs. Regarding the hilar pattern, variations were seen in the number and arrangement of structures of both the right and left lungs.
Conclusion
Variations in the completeness of fissures as well as the hilar pattern are a common occurrence. Thus, surgeons and radiologist need to be aware of these morphological variations as they may cause misdiagnosis and complications during surgical procedures.