An island flap based on the anterior branch of the superficial temporal artery for perioral defects

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Free full text on www.ijps.org Original Article An island flap based on the anterior branch of the superficial temporal artery for perioral defects V. Bhattacharya, Ganji Raveendra Reddy, Sheikh Adil Bashir, Sunish Goyal Department of Plastic Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India Address for correspondence: V. Bhattacharya, B-33/14-16, Gandhi Nagar, Naria, Varanasi - 221005, Uttar Pradesh, India. E-mail: visweswar1@rediffmail.com ABSTRACT Defects following excision of lesions in and around the oral commissure extending on either lip are not infrequent. A majority of them are malignant. Various local flaps have been described to correct these defects, but sometimes they may not be feasible. However, the advantage of single-stage reconstruction can still be achieved by using an island forehead flap based on the anterior branch of the superficial temporal artery. This is a versatile flap with a reliable blood supply. It is relatively less popular as it involves time-consuming dissection. Aims: We have modified the island forehead flap based on the anterior branch of the superficial temporal artery by designing the flap on the frontoparietal region based on the terminal course of the anterior branch of the superficial temporal artery. Materials and Methods: This flap was used in five cases of perioral defects involving both the upper and lower lips including the angle of the mouth. Conclusions: Small to moderate dimension full thickness perioral defects can thus be reconstructed effectively with this modified flap in a single stage. The functional and aesthetic results are gratifying with minimal donor site morbidity. KEY WORDS Full thickness oral defect, perioral defect, superficial temporal artery island flap INTRODUCTION Reconstruction of full thickness perioral defect following excision of malignant lesions is challenging to reconstructive surgeons. [1] The principle is to provide three-dimensional tissues for lining, cover and a border. At the same time it should provide good mouth opening with acceptable aesthetic result. [2] When there is a malignancy, the oral mucosa is often more involved than the skin, hence the mucosal defect is larger than the skin defect. [3] Thus, greater area of non-hairy tissue is required for the reconstruction. Various options have been described utilizing local, regional and distant tissues, either in the form of a pedicle flap or a free flap. The majority of the loco-regional flaps like over and out flap of Converse, [3] Estlander flap, [4] Nasolabial flap [5] and Tongue flaps [6] are inadequate and often produce microstomia. Whereas, distant flaps like total Forehead flap, [7] Cervical flap, [8] Bakamjian flap, [9] Pectoralis major myocutaneous flap, [10] Sternomastoid musculocutaneous flap [10] and Trapezius flap [10] are either too bulky or involve multi-stage procedures. The island flap based on the anterior branch of the Indian J Plast Surg July-December 2006 Vol 39 Issue 2 136

Island flap for perioral defects superficial temporal artery (ASTA) is not a new flap. McGregor described it first in 1966, as the temporal island flap, [11] based on the superficial temporal vessel pedicle. Subsequently, it appeared in the literature sporadically. This flap did not become very popular due to the technical difficulty in harvesting and the associated donor site morbidity. Many a times the forehead skin alone is insufficient for reconstruction of an averagesized defect in and around the perioral region. However, by incorporating the adjacent parietal region of the scalp, in patients with receded hairline, this flap is one of the more versatile options to reconstruct the perioral defect in a single stage with minimal donor site morbidity. In this article we share our experience of five cases using this modification of incorporating the parietal skin with forehead skin, done during June 1999 to March 2003. recurrence. The functional and aesthetic results were very acceptable. Operative technique The procedure was done under general anesthesia. The entire course of the ipsilateral ASTA can be palpated very easily, especially in the older age group and in patients with receded hairline. It should be confirmed with the audio Doppler. Starting from 1 cms., anterior to the tragus till its termination in the forehead, the entire course of the artery is traced and marked. This is desirable for safety, though it may not be mandatory in experienced hands. At the terminal end of the anterior branch, over the frontoparietal region, the required dimension of the island paddle of the flap is marked. The design of the MATERIALS AND METHODS flap is made in such a way that about two-third lies in the fronto-parietal region and one-third on the forehead. Over a period of four years, we have used this flap in Such a defect can be closed primarily, avoiding donor five cases of perioral defects for both the upper and the site morbidity. Xylocaine (0.5%) with adrenaline 1:200,000 lower lips including the angle [Table 1]. All the patients is infiltrated in the surrounding tissue to minimize blood were males ranging from 40 to 70 years with a mean loss and also to facilitate dissection. An incision is made age of 55 years. All the defects were following the along the margins of the island flap and extended a few excision of low-grade squamous cell carcinomas (T1 N0 millimeters above and along the course of the vessel, M0 or T2 N0 M0). The size of the defects ranged from up to the tragus. The plane of the vessel is in the 4-7 cms. in width to 5-8 cms. in length. In three patients subcutaneous tissue. Therefore, the surrounding tissue the lesion was on the left and in two on the right. In all should be dissected carefully leaving at least two fat the cases, the defect was reconstructed with ipsilateral globules in the subdermal layer to ensure an adequate island flap based on the anterior branch of the superficial subdermal plexus thus preventing marginal necrosis of temporal artery. The size of the flap ranged from 5-8 the suture line as well as avoiding damage to the vessel. cms. in width to 6-10 cms. in length. Our largest flap Then, the dissection of the flap is done from distal to was 7 x 8 cms. and the smallest was 5 x 7 cms. The proximal, keeping the remaining amount of subcutaneous postoperative period was uneventful. All the flaps healed tissue with the pedicle. Utmost care is taken to protect without any complication. In three patients donor site the arterio-venous system. After completing the flap was closed primarily and in two cases the defect was elevation, a subcutaneous tunnel is made in the cheek, reduced and split skin grafted. Minor secondary adequate to allow the flap to reach the defect. As per corrective procedure was required in one case. The requirement, the flap is folded and then inserted, to average follow-up period was three years without provide lining and cover in continuity. In this process, Table 1: Patient summary Patient Age Sex Site of the defect Size of Size of Management of the donor site the defect the flap BxLin cm BxLin cm 1 40 M Left commissure and cheek 4x6 5x7 Primarily closed by undermining and advancement 2 56 M Left commissure and lower lip 6x7 7x8 Split skin grafting 3 60 M Left commissure and cheek 5x7 7x7 Primarily closed by undermining and rotation flaps 4 62 M Right commissure and 80% of lower lip 7x5 8x6 Split skin grafting 5 70 M Right commissure and cheek 4x8 5x10 Primarily closed by making two rotation flaps 137 Indian J Plast Surg July-December 2006 Vol 39 Issue 2

Bhattacharya V, et al. the folded margin inevitably forms the vermilion border and oral commissure at the angle of the mouth. In the majority of cases the donor site can be closed primarily either by undermining and advancement or by converting into two rotation flaps. Larger defects require skin grafting after reducing the size. The average size of the defect in our series was 6 x 5 cm and average dimension of the flap was 7 x 6 cm. closure of the defect following excision of the malignancy. He further said, Technically this is one of the difficult flaps to harvest, due to lack of good surgical planes. He also cautioned to take additional care to prevent necrosis of the overlying skin. He wrote We have no doubt that the island is rather less safe than the full temporal flap with or without tunnel. [11] In this series we have modified the classical temporal RESULTS island flap that was described by McGregor. The anterior branch of superficial temporal artery, after its division All the flaps had complete success with good functional from the main branch becomes superficial and travels in and aesthetic results. Patients were evaluated based on the subcutaneous tissue and subsequently becomes parameters like patient acceptability, microstomia, the dermal in the frontoparietal region. The course of the overall aesthetic appearance and the donor site artery may be variable. In 80% of cases, it continues as morbidity. Patient acceptability was excellent with normal one of the terminal branches of the superficial temporal mouth opening. Aesthetic appearance was good; in one artery (Type I). Whereas in 20% of individuals, it case minor secondary procedure was done. Donor site continues as the main branch and a posterior division morbidity was minimal. arises as a branch from it (Type II). [12] We have designed the flap based on this terminal course of the anterior Patient summary branch, on the forehead and parietal region of the scalp. The advantages of this flap are: Case report 1. The entire course of the artery till its termination is A 70-year-old man presented with squamous cell easily visible and palpable, carcinoma of the buccal mucosa extending to the 2. The temporoparietal region is often non-hairy, commissure and the cheek [Figure 1]. The defect especially in the older age group, particularly in males, following excision was 4 x 8 cms. An Island flap [Figure due to receding of both the frontal and temporo 2] based on the anterior branch of the superficial temporal parietal hairlines. This (a) provides good amount of artery was used to reconstruct the mucosa, commissure non-hairy tissue, suitable for reconstruction of and the adjoining cheek defect in mouth open position perioral defect including lining and (b) by inclusion as a single stage procedure [Figure 3]. The donor site of temporoparietal region, with forehead, flaps of was closed primarily by rotation flaps. The functional larger dimension can be harvested. and aesthetic results were gratifying and the donor site 3. Due to its axial blood supply, an island flap can be morbidity was negligible [Figures 4-5]. designed to complete the procedure in a single stage. 4. Being scalp tissue, this flap has minimal amount of DISCUSSION subcutaneous tissue; hence it is desirably thin and pliable, which is suitable for reconstruction of perioral The main objective of this article is to share our defects. experience emphasizing the modification in designing 5. Due to laxity of skin, in the older age group, the the flap, selection criteria of the patients, the technical donor site can be closed primarily with minimal details, its advantages and results. donor site deformity. In 1966, McGregor reported the temporal island flap based on the superficial temporal pedicle. He kept the pedicle as broad as the flap itself and suggested inclusion of as much thickness of tissue as practicable. He mentioned it as one of the excellent choices, if one wished to complete the procedure in a single stage. In those days, he stressed the importance of primary Thus, this flap is indicated in patients with a broad forehead, receded frontal and temporoparietal hairlines with lax forehead skin and for small to moderate size perioral defects. It was felt that the dissection requires extra caution, as there is no definite surgical plane for the vessel. The importance of proper pre-operative planning by doing planning in reverse is essential. The Indian J Plast Surg July-December 2006 Vol 39 Issue 2 138

Island flap for perioral defects Figure 1: Malignant lesion involving the cheek and the commissure, with proposed plan of the flap Figure 2: Dissected island flap prior to tunneling to the defect Figure 4: Postoperative functional and esthetic result with negligible donor site morbidity after six months Figure 5: Postoperative functional and esthetic result with negligible donor site morbidity after six months and facilitates surgical dissection. In our experience the 1:200,000 adrenaline had no deleterious effect on the vessel. Bipolar cauter y and loupe magnification proves advantageous. Two subcutaneous fat globules should be preserved while raising the skin flap during dissection of the pedicle, to avoid skin necrosis. The subcutaneous tunnel should be adequate enough to allow the flap to reach the defect, without compression on the pedicle. Since the flap is thin and pliable, it can be moulded to any kind of a threedimensional defect. Figure 3: Flap insetted as lining and cover. The folded margin forms the commissure in the mouth open position entire course of the artery should be traced and marked with the help of audio Doppler before surgery. The use of xylocaine with adrenaline certainly minimizes the bleeding In our experience, this is one of the flaps of choice to reconstruct perioral defects, its major advantage being a single-stage procedure. The results were highly gratifying both functionally and aesthetically. Finally, to quote Ian McGregor, Where the use of the island makes possible a single-stage repair, the slight added difficulty and risk is probably acceptable. [11] 139 Indian J Plast Surg July-December 2006 Vol 39 Issue 2

Bhattacharya V, et al. REFERENCES 1. McGregor IA, McGregor AD. Fundamental techniques of plastic surgery and their surgical applications. Churchill Livingstone: Edinburgh; 1995. p. 161-5. 2. Vegers JW, Snow GB, van der Waal I. Squamous cell carcinoma of the buccal mucosa. A review of 85 cases. Arch Otolaryngol 1979;105:192-5. 3. Converse JM. The over and out flap for restoration of the corner of the mouth. Plast Reconstr Surg 1975;56:575-8. 4. Estlander JA. Eine Methode aus der einen Lippe Substanzverluste der anderen zu ersetzen. Arch Klin Chir 1872;14:622-6. 5. Ohtsuka H, Shioya N, Asano T. Clinical experience with nasolabial flaps. Ann Plast Surg 1981;6:207-12. 6. Ganguli A. Use of tongue flap to line cheek defects in surgery for cancer. Plast Reconstr Surg 1968;41:390-2. 7. Kavarana NM. Use of a folded forehead flap for reconstruction after a large excision of the full - thickness of the cheek. Plast Reconstr Surg 1975;56:629-32. 8. Bunkis J, Mulliken JB, Upton J, Murray JE. The evolution of techniques for reconstruction of full thickness cheek defects. Plast Reconstr Surg 1982;70:319-27. 9. Bakamjian VY, Long M, Rigg B. Experience with the medially based deltopectoral flap in reconstructive surgery of the head and neck. Br J Plast Surg 1971;24:174-83. 10. Ariyan S. Pectoralis major, sternomastoid and other musculocutaneous flaps for head and neck reconstruction. Clin Plast Surg 1980;7:89-109. 11. McGregor IA, Reid WH. The use of the temporal flap in the primary repair of full thickness defects of the cheek. Plast Reconstr Surg 1966;38:1-9. 12. Wilson JS. The application of the two centimeter pedicle flap in plastic surgery. Br J Plast Surg 1967;20:278-96. Indian J Plast Surg July-December 2006 Vol 39 Issue 2 140