Submental island flap as an alternative to microvascular free flap in intraoral defect reconstruction after ablative oral cancer surgery at resource constraint setting environment
This retrospective study conducted in Nepal demonstrates that the submental island flap is a reliable and effective alternative to microvascular free flaps for reconstructing intraoral defects following oral cancer surgery in resource-constrained settings, achieving a 95.56% success rate with acceptable oncological outcomes.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
When a surgeon removes a cancerous tumor from the mouth, the challenge does not end with the cutting. The resulting gap is often a complex void where skin, muscle, and sometimes bone used to be. To restore a patient's ability to speak, swallow, and chew, doctors must fill this space with healthy tissue. For decades, the most advanced solution has been the microvascular free flap, a technique where surgeons take a piece of skin and muscle from a distant part of the body, such as the forearm, and reconnect its tiny blood vessels to the neck using a microscope. While this method is highly effective, it requires expensive equipment, specialized training, and long operating times that many hospitals simply cannot afford. In places where these resources are scarce, doctors have long searched for a reliable alternative that can be performed with standard surgical tools and still offer a high chance of success.
In a study conducted at a hospital in Nepal, researchers investigated a specific local solution called the submental island flap. This technique involves taking a thin, pliable piece of skin and tissue from directly under the chin, which is connected to the face by a natural blood vessel. Because the tissue is already nearby and attached to a working blood supply, surgeons do not need to disconnect and reconnect tiny vessels under a microscope. The team reviewed the medical records of 45 patients who had undergone this procedure after having oral cancer removed. They wanted to see if this simpler approach could survive and function as well as the more complex methods, particularly for patients in environments where advanced microsurgery is not an option.
The results showed that the local tissue from under the chin is a robust and dependable choice. Out of the 45 patients, 43 experienced successful flap survival, meaning the transplanted tissue remained healthy and integrated into the mouth. Only two patients lost their flaps. The patients in the study were mostly men with an average age of nearly 58, and the vast majority had developed cancer due to chewing tobacco, a common habit in the region. The tumors were located in various parts of the mouth, with the area where the lower gum meets the inner cheek being the most frequent site. The surgeons removed the cancer and then used the submental flap to cover the hole, often performing the entire operation without the need for a microscope or a second surgical team.
Beyond the immediate success of the surgery, the study also looked at whether using tissue from under the chin posed any hidden risks for cancer returning. Since this tissue is harvested from the neck area, there was a theoretical concern that it might disturb lymph nodes or leave behind microscopic disease. However, the data suggested this was not a significant problem in this group. During the follow-up period, which ranged from a few months to nearly three years for some patients, only six individuals saw their cancer return. This recurrence rate was low, and the researchers noted that the majority of patients had early-stage disease, which likely contributed to the positive outcome. The study found that the flap provided a good match for the color and texture of the mouth lining, and the donor site under the chin healed well enough that it could usually be closed with a simple stitch.
The findings indicate that for many patients, especially those in resource-limited settings, the submental island flap is a safe and effective way to rebuild the mouth after cancer surgery. It offers a high rate of success without the heavy infrastructure demands of microvascular surgery. While the study was conducted at a single center and involved a relatively small number of patients, the outcomes provide strong evidence that this technique deserves a place in the standard toolkit for oral reconstruction. It represents a practical bridge between the ideal of advanced reconstruction and the reality of limited resources, ensuring that more patients can regain their ability to eat and speak without waiting for technology that may never arrive.
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