Full-thickness skin grafts (FTSGs), a classic reconstruction method for facial skin defects, have been used for large defects or in areas where severe distortion is expected upon reconstruction with primary closure or for local flaps, such as the nasal area, periorbital area, and the ear [1]. Factors such as skin thickness, color, and texture, the pattern of sun exposure, and adnexal quality should be considered when selecting the appropriate donor site [1,2]. Considering these factors, preauricular, posterior auricular, supraclavicular, conchal bowl, nasolabial fold, and upper eyelid skin areas have been mainly used as donor sites for facial FTSG [1-4]. However, color mismatch from using non-facial skin as a donor, as well as the higher proneness of Asian skin to hypertrophic scarring and hyperpigmentation than that of Caucasian skin, are limitations when using supraclavicular and clavicular areas as donor sites [3,5]. We performed multiple FTSGs using infraclavicular skin as the donor on skin defects caused by skin cancer resection, and contrary to the aforementioned concerns, we obtained satisfactory results. Therefore, this work aimed to describe the advantages of infraclavicular skin as a donor site and the specific cases in which this donor site is useful.

This was a retrospective study of patients who had undergone facial skin cancer resection or reconstruction between March 2017 and June 2019. Patients who underwent facial skin cancer resection for melanoma, Bowen’s disease, squamous cell carcinoma (SCC), and basal cell carcinoma (BCC) were selected from medical records. We included patients who underwent FTSG using an infraclavicular donor site and excluded those who died during the study period. Patients who were followed up for >6 months were surveyed for satisfaction.

The requirement for patient informed consent was waived due to the retrospective nature of this study. This study complied with the Declaration of Helsinki ethical principles, and we obtained institutional review board approval (IRB No. JEJUNUH 2020-06-004).

We analyzed the data of 17 patients, four men and 13 women, who met the inclusion criteria. Patient age ranged from 67 to 95 years, with a mean age of 80 years. In terms of skin cancer types, there were eight cases of BCC, seven cases of SCC, one case of Bowen disease, and one case of melanoma. A similar proportion of BCC and SCC cases was observed, which comprised the majority of the cases. The number of cases based on the locations of cancer lesions were: five, four, four, three, and one cases with lesions on the nose, temple, glabella, cheek, and forehead, respectively. Four of the five cases on the nose and all cases on the glabella were classified as BCC, whereas three of the four cases on the temple and two of the three cases on the cheek were classified as SCC. Hence, there were mostly BCCs on the nose and glabella, and SCCs on the cheek and temples. The size of the cancer lesions ranged from 7 to 45 mm, with a mean diameter of 24 mm. Most lesions on the glabella and cheek with a diameter <25 mm were relatively smaller than those found on the cheek, forehead, and temples. The mean operation time was 78.7 minutes (Table 1).

The patients were observed for at least 6 months, and the donor and recipient sites of all patients healed without complications. Postoperative photographs of lesions on the nose and glabella are shown in Figs. 3 and 4. Upon evaluation, it was demonstrated that, the average Manchester Scar Scale scores for the recipient and donor sites were 7.4 points and 5.7 points, respectively. A more detailed analysis showed that mild depression in the contours of the recipient sites resulted in lower satisfaction (mean score=1.8), whereas hyperpigmentation resulted in lower satisfaction in the donor sites (mean score=1.6). However, overall, based on the scar scale satisfaction assessment, the patients felt comfortable and satisfied with the surgery (Table 2).

In general, using a local flap is the first method of choice for constructing a facial soft tissue defect following skin cancer resection because it achieves cosmetically excellent results. However, when the defect size is large or if structural deformation is expected, FTSG is considered [7]. When selecting a skin graft donor site, not only skin characteristics, such as skin thickness, color, adnexal quality, and texture, but also a variety of other factors, such as surgical feasibility, scarring of the donor site, and patient satisfaction, should be considered. Considering these factors, the preauricular, posterior auricular, nasolabial fold, and upper eyelid skin areas are used for facial FTSG because they are well known donor sites for achieving good cosmetic results [1-4]. The commonly used posterior auricular grafts are advantageous as they can cover the scar; however, they are limited in terms of the surface area that can be used [8]. Supraclavicular grafts have the advantage of having a relatively large usable surface area than postauricular area. However, the posterior auricular skin and supraclavicular skin are both considerably thin at approximately 0.71 and 0.77 mm, respectively, which may cause depression when implanted on areas, such as the forehead, nose, and cheek, which are relatively thicker (>1 mm) [2,9,10].

The infraclavicular skin used in this study has the following advantages. First, a larger amount of skin can be harvested from this area than from the facial or supraclavicular donor sites. There is no physiological barrier when designing the area to be harvested, and there is less anatomical distortion, even with primary closure. Although split-thickness skin grafts can be used in large facial reconstruction, the poor texture and marked contracture of these grafts often result in permanent cosmetic or functional impairments. A large graft with a maximum size of 15×5 cm can be also harvested bilaterally from the supraclavicular area depending on age and skin laxity [11]. However, disadvantages, such as bony prominence, can cause scar widening wound breakdown, and the scar may be exposed when wearing clothes wherein the clavicle is visible [12]. In fact, patients who complained of scarring at the supraclavicular donor site have also been reported [13]. The infraclavicular area has the important advantage of remaining covered, even when wearing clothes with a revealing neckline. Additionally, although there were concerns regarding the formation of a hypertrophic scar in the chest area, our findings showed that the contours of the formed scars were mostly flat. In our study, the patients’ mean age was 80 years, so the infraclavicular area is loose enough for harvesting a large graft. An area of up to 5×12 cm in size could be harvested, and primary closure was successfully performed. A previous study reported that the lateral thoracic area can be a useful donor site of FTSG for reconstructing a large facial skin defect and has advantages in terms of color, texture, thickness, and convenience [12,14].

Second, minimal depression can be achieved when reconstructing thicker skin, such as on the forehead, nose, and cheek. A previous study result reported that a contour problem occurred when using the periauricular and supraclavicular skin for reconstructing thick skin, such as on the lower third of the nose [15]. In this study, many cases of skin cancer lesions with thickness >1 mm on the forehead, nose, and cheek were operated on (Table 1). Considering that skin thickness in the upper chest was approximately 1.44 mm, thicker skin can be obtained from this area compared to that from the postauricular (0.71 mm) or the supraclavicle donor sites (0.77 mm) [9,10]. In this study, ultrasonography was used to measure skin thickness in three patients, where infraclavicular skin was approximately >0.5 mm thicker than in the supraclavicle area (Fig. 5). The failure rate of a thick graft is higher than that of a thin graft because it entails a high metabolic rate. However, during >6 months of follow-up, graft uptake was successful in all patients. Depression at the recipient site was rare, even when contracture of the graft was considered.

Third, the duration of the procedure can be minimized. The mean age of skin cancer patients in Korea is over 60 years, similarly, the subjects in this study had a mean age of 80 years [16]. In such cases, minimizing the duration of surgery is crucial to reduce postoperative complications. Because there is enough space between the donor and the recipient site, cancer excision and skin harvest can be performed simultaneously by a twoteam approach. Furthermore, compared with areas, such as the posterior auricular skin, which tend to be less accessible or indented, the infraclavicular skin area provides the advantage of allowing patients to change the dressing themselves.

A color mismatch may occur compared with facial donor sites. Although the scar scale of the recipient site demonstrated color parameter with relatively lower satisfaction than other parameters, minimal color difference was observed than anticipated in the postoperative evaluation, and patient satisfaction levels were high (Figs. 3, 4).

Some limitations of this study are the relatively small number of subjects and the lack of a control group, which posed a challenge in directly comparing with other donor sites. There is also a practical limitation because directly comparing the operation time and operation results in the same patient is difficult. Therefore, the infraclavicular donor site data presented in this paper needs to be further validated to be generalized. The efficacy of infraclavicular skin as a donor for facial skin grafts can be confirmed by direct comparison with other donor sites, and long-term research with larger study population is required.

Local flap surgery is a common method of reconstructing a defect after resection of the skin cancer if the defect is small and structure distortion is not expected [17,18]. The use of the facial skin as donor sites can be cosmetically superior even when skin graft is required for a large defect. However, the present study indicates that the infraclavicular skin area may be a useful donor site for facial FTSG in cases where the defect size is large or when thick areas, such as the nose, forehead, or cheek, have to be reconstructed and when the duration of time spent under anesthesia needs to be minimized due to the patient’s old age or underlying health conditions.