Clinical reliability of pedicled perforator flaps in the management of adult limb and trunk soft tissue sarcomas: Experience of two French expert centres

Soft tissue reconstruction of the trunk with pedicled perforator and musculocutaneous flaps: A single-center comparative retrospective study

BACKGROUND

Soft tissue trunk reconstruction is often challenging. Although free microvascular flaps are a feasible option in case of extensive defects involving deep structures, pedicled flaps represent a good alternative, especially if harvested and dissected with a "microsurgical" approach. The aim of this study is to evaluate the feasibility of trunk reconstruction with the use of pedicled flaps, according to the application of our reconstructive algorithm, and to compare it to other reconstructive methods.

PATIENTS AND METHODS

From January 2017 to December 2021, we retrospectively analyzed patients who underwent soft tissue reconstruction of the trunk with pedicled flaps at the authors' institution. Patient's demographic, clinical and surgical characteristics and postoperative complications were recorded and analyzed by descriptive statistics. A comparative analysis was made between the study group and two other groups who underwent reconstruction of trunk defects with free flaps and skin grafts, respectively, at the authors' institution.

RESULTS

Forty-seven patients were included in the study. Patients' age ranged between 36 and 82 years (mean: 57.8 years). Twenty-eight patients were male, while 19 patients were female. In 76.6% of patients (36 out of 47), reconstructive procedures were performed to repair defects resulting from cancer resection. Reconstruction of superficial defects was always achieved with perforator flaps (n = 25). In case of full-thickness defects, reconstruction was carried out with musculocutaneous flaps (n = 22); latissimus dorsi and vastus lateralis were the most used flaps for chest and abdominal wall reconstruction, respectively. In our series, we observed only one case of total flap loss requiring re-operation under general anesthesia. Minor complications occurred in 8.5% of cases (4 out of 47 patients). We observed two cases of partial flap necrosis and two cases of wound dehiscence. In the skin grafts group (n = 53), the mean age was 54.5 years (range 39-85) and 56% of patients were male (n = 30). In 66% of cases (n = 30) the defect resulted from oncological resection. The overall complication rate was 18.8% (n = 10). In the free flaps group (n = 10), the mean age was 49.0 years (range 29-77) and 60% of patients (n = 6) were male. In 70% of cases (n = 7) the defect was caused by oncological resection. Complications occurred in two patients (20%). No statistically significant differences were found in terms of overall complication rate between the study group and the two comparative groups (p = .48). A significant correlation was found between the reconstructive method and the type and size of the defect, with reconstruction through free flaps being associated with larger (344.0 vs. 220.4 cm2 ) (p = .04) and full-thickness defects (80.0% vs. 46.8%) (p < .01) if compared to pedicled flaps.

CONCLUSIONS

In the new era of microsurgery, pedicled flaps represent a valid alternative to free flaps for the majority of soft tissue defects of the trunk. In our series, no statistically significant differences in terms of complications were found between reconstructions of similar defects achieved with pedicled and free flaps, and free flap use was limited to extensive full-thickness defects. In addition, the rate of postoperative complications with pedicled flaps found in our cohort was lower than the rate reported in the literature.

Conjoined thoracodorsal perforator-supercharged dorsal intercostal artery perforator propeller flap for reconstruction of a complex upper back defect: Case report and review of the literature on supercharged pedicled perforator flaps

The reported complications' rate of perforator propeller flaps is variably high, but the etiology of distal flap necrosis, potentially linked to vascular insufficiency, is yet to be clarified. Vascular augmentation procedures have been previously described involving an extra anastomosis of a superficial vein, while a perforator-to-perforator supercharging approach has been only sporadically documented in literature. We present a case of perforator-to-perforator vascular supercharging of an extended dorsal intercostal artery perforator (DICAP) propeller flap to provide a salvage option for pedicled flap complicated by venous congestion. A 71-year-old male patient underwent Dermatofibrosarcoma Protuberans resection in the upper back, leading to a 17 × 17 cm defect with bone exposure. A 30 × 9 cm DICAP propeller flap was planned, with the distal third of the flap designed over the adjacent Thoracodorsal artery perforasome, in a conjoined fashion. Considering the small DICAP pedicle caliber and the flap lateral extension, a thoracodorsal artery perforator vein was dissected and included in the distal flap. Once the flap was raised on its main pedicle, the skin paddle turned blue, showing signs of venous insufficiency. Indocyanine green angiography (ICG) showed a viable proximal half of the flap. Hence, after rotating the skin paddle to reach the upper margin of the defect, an additional anastomosis between the perforating thoracodorsal vein and the perforating vein of the dorsal scapular pedicle was performed according to the perforator-to-perforator approach. Doing so, both clinical and ICG examinations showed a well perfused flap, with normal capillary refill. The postoperative course was uneventful, and the patient obtained a good oncological and reconstructive result 4 months postoperatively. The second Vasconez law ("all of the flap will survive except the part that you need") is often encountered in propeller flaps surgery. Our case shows that it is possible to prevent or overcome this problem by planning appropriate vascular augmentation procedures according to the perforator-to-perforator approach, being guided by advanced vascular imaging tools like ICG.