Application of CT-Based Three-Dimensional Reconstruction to Guide Anatomical Resection for Congenital Pulmonary Airway Malformations in Children

In the developing lungs of a child, a rare condition can take root where the air sacs grow into a tangled, cystic mass instead of forming the delicate, branching trees needed for breathing. This condition, known as congenital pulmonary airway malformation, is a structural error present from birth. While some children never feel its effects, others suffer from repeated infections, breathing difficulties, or the risk of the abnormal tissue turning cancerous later in life. For decades, the standard solution has been to remove the entire lobe of the lung containing the problem, a procedure that guarantees the bad tissue is gone but also sacrifices a significant amount of healthy lung. However, because children have a remarkable ability to grow new lung tissue over their lifetimes, surgeons have long sought a way to remove only the diseased part while saving the healthy surrounding tissue. The challenge lies in the fact that these malformed areas often do not follow the neat, textbook boundaries of the lung's natural segments, making it difficult to know exactly where to cut without leaving disease behind or damaging healthy vessels.

To solve this puzzle, a team of surgeons at Fujian Children's Hospital in China turned to a digital tool that allows them to see inside a patient's chest in three dimensions before making a single incision. They studied 185 children who underwent surgery for this condition between July 2023 and March 2025. For every child, the team took standard, non-contrast CT scans—images that show the body in thin slices—and fed them into specialized software. This software acted like a sculptor, building a custom, patient-specific model of the lung, the airways, and the blood vessels. By manipulating these digital models, the surgeons could trace the exact path of the abnormal tissue, identify which blood vessels fed it, and plan a precise cut that would remove the lesion while leaving the maximum amount of healthy lung intact. This approach allowed them to compare three different surgical strategies: removing the whole lobe, removing a specific segment of the lobe, or performing a tailored, lesion-focused resection guided by the 3D map.

The results of this study suggest that using these 3D maps to guide a targeted, lung-sparing surgery is not only possible but also safe. The researchers found that children who underwent this precise, lesion-focused removal had outcomes very similar to those who had the more traditional, larger removals. The time spent in the hospital was roughly the same for all groups, averaging about five days. However, the surgery itself took slightly longer for the targeted approaches, averaging about 95 minutes for the segment-focused removals and 92 minutes for the lesion-focused ones, compared to 80 minutes for the standard lobe removal. The time the chest tube remained in place to drain fluid was also longer for the targeted group, averaging four days, compared to two days for the others. Despite these small differences in the immediate recovery, the rate of complications such as pneumonia or air leaks was similar across all groups.

A key finding emerged when the researchers looked at how the lungs adapted after the surgery. In children who had a large lobe removed, the remaining lung tissue expanded significantly to fill the empty space, a natural process called compensatory hyperinflation. This occurred in ten children who had a lobe removed, but only in two children who had a segment removed and just one child who had the targeted lesion-focused surgery. This suggests that by preserving more healthy tissue during the operation, the need for the remaining lung to over-expand is reduced, which may be beneficial for the child's long-term lung function. The study also confirmed that the targeted surgeries were effective at removing the disease completely, with no signs of the malformation returning or being left behind during the follow-up period.

The authors emphasize that while these findings are promising, they come with a note of caution. Because the study was retrospective, meaning it looked back at past records rather than randomly assigning children to different surgeries, the decision to use a specific technique was made by the surgeons based on the specific complexity of each case. This means the results show that the technique works, but they do not definitively prove it is superior to the traditional method in every situation. The study serves as a proof of concept, demonstrating that 3D reconstruction provides a clear, anatomical roadmap that allows surgeons to perform delicate, lung-saving operations with confidence. It bridges the gap between a flat image on a screen and the complex, three-dimensional reality inside a child's chest, offering a way to tailor the surgery to the unique shape of the disease rather than forcing the disease to fit a standard surgical template. As the field moves forward, the hope is that these digital tools will become a standard part of planning, helping surgeons spare as much healthy lung as possible for the decades of life that lie ahead.