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Background: Soft tissue defects of the lower limbs pose significant challenges in reconstructive surgery, accounting for approximately 10% of all reconstructive free flaps performed. These reconstructions often encounter higher complication rates due to various factors such as inflammation, infection, impaired blood flow, and nerve injuries. Methods: A systematic review was conducted following PRISMA guidelines, reviewing literature from 2017 to 2024. Eligible studies included those on free flap reconstruction of lower limb defects in living human subjects, with more than three cases and reported rates of flap failure and return to the operating room. Systematic reviews and metanalysis were excluded. Results: A total of 17 studies comprising 5061 patients and 5133 free flap reconstructions were included. The most common defects were in the lower leg (52.19%) due to trauma (79.40%). The total flap necrosis rate was 7.78%, the partial necrosis rate was 9.15%, and the rate of return to the operating room for suspected vascular compromise was 13.79%. Discussion: Lower limb reconstruction presents challenges due to diverse etiologies and variable tissue requirements. Factors such as recipient vessel availability, flap selection, and multidisciplinary approaches influence outcomes. Muscle and fasciocutaneous flaps remain common choices, each with advantages and limitations. This systematic review underscores the importance of individualized treatment planning. Conclusions: Microsurgical reconstruction of lower limb defects demonstrates safety and reliability, with overall favorable outcomes. Flap selection should be tailored to specific patient needs and defect characteristics, emphasizing meticulous surgical techniques and multidisciplinary collaboration. This systematic review provides valuable insights into current standards and encourages adherence to best practices in lower limb reconstruction.
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We conducted a retrospective, longitudinal study on a single-center series of patients who underwent parotidectomy in the management of advanced head and neck non-melanoma skin cancer (hnNMSC). The aim of this study was to identify prognostic factors associated with worse outcomes. Forty-one men and nine women were included. The mean age at the time of surgery was 78.9 years. The 5-year overall survival, disease-specific survival, locoregional recurrence-free survival, and distant metastasis-free survival calculated with Kaplan-Meier curves were 39.9%, 56.3%, 58.6%, and 82.1%, respectively. A univariate analysis showed that the status of the margins, facial nerve direct involvement, lymph vascular invasion, and histological grading were associated with worse outcomes (p < 0.05). Positive margins were associated with worse disease-specific survival also in a multivariate analysis (p = 0.001, HR = 32.02, and CIs 4.338 to 351.3). Because the resection in free margins is the most important prognostic factor, early diagnosis or, in the case of advanced disease, extensive surgical resection with concomitant reconstruction is needed. Adjuvant therapy is indicated in selected cases.
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Background: The Hybrid Cooperative Complexes of high and low molecular weight hyaluronic acids (HHCC) improve skin structure and bioactivity. Massive weight loss damages cellular composition and morphological structure of skin. An injective treatment of postobese skin consisting of HHCC may have a role in counteracting these histopathological alterations. Objectives: To analyze the histological effects of HHCC injection in the cutaneous tissues of massive weight loss patients suffering from arm laxity. Methods: Nine ex-obese patients with postweight-loss-related arm laxity and ptosis requiring brachioplasty were prospectively recruited at the first author's department. HHCC injection was performed on only 1 arm, which included 2 injective sessions separated by 30 days. One month posttreatment, patients underwent a bilateral brachioplasty, and the surgical specimens were histologically examined, searching for any variation in the cutaneous connective tissue following injections. Histology on treated specimens showed a statistically significant increased density of elastic fibers along with a lower fragmentation of the same fibers compared to the untreated tissue. Fibroblasts demonstrated a swollen appearance as if involved in a bioactivation process. Results: Treatment with HHCC increases the number of elastin fibers and determines a more regular elastin deposition and architecture, as well as the bioactivation of fibroblasts. The contralateral untreated area showed an irregular structure with elastosis and elastolysis. Conclusions: More studies are necessary, but histologically proven benefits are demonstrated in the HHCC-treated skins when compared with basal controlateral skin. These data support the use of HHCC formulations for the treatment of postobese skin laxity.
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The article introduces neurotrophic keratopathy (NK), a condition resulting from corneal denervation due to various causes of trigeminal nerve dysfunctions. Surgical techniques for corneal neurotization (CN) have evolved, aiming to restore corneal sensitivity. Initially proposed in 1972, modern approaches offer less invasive options. CN can be performed through a direct approach (DCN) directly suturing a sensitive nerve to the affected cornea or indirectly (ICN) through a nerve auto/allograft. Surgical success relies on meticulous donor nerve selection and preparation, often involving multidisciplinary teams. A PubMed research and review of the relevant literature was conducted regarding the surgical approach, emphasizing surgical techniques and the choice of the donor nerve. The latter considers factors like sensory integrity and proximity to the cornea. The most used are the contralateral or ipsilateral supratrochlear (STN), and the supraorbital (SON) and great auricular (GAN) nerves. Regarding the choice of grafts, the most used in the literature are the sural (SN), the lateral antebrachial cutaneous nerve (LABCN), and the GAN nerves. Another promising option is represented by allografts (acellularized nerves from cadavers). The significance of sensory recovery and factors influencing surgical outcomes, including nerve caliber matching and axonal regeneration, are discussed. Future directions emphasize less invasive techniques and the potential of acellular nerve allografts. In conclusion, CN represents a promising avenue in the treatment of NK, offering tailored approaches based on patient history and surgical expertise, with new emerging techniques warranting further exploration through basic science refinements and clinical trials.
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INTRODUCTION: The excision of lesions that are not oriented along the skin tension lines may cause the surgeon to design extremely broad elliptical preoperative markings, with the intent to follow the tension lines as recommended for the best postoperative course and the best quality scars. The aim of this study is to describe and clinically apply a new surgical technique called the parallelogram excision technique, in which the traditional ellipse with a major axis parallel to the tension lines is converted into a parallelogram whose lesser sides are coincident with the local skin tension lines. This technique was specifically conceived for lesions whose major axis is non-coincident with skin tension lines, and the primary advantage is that it reduces the amount of healthy tissue excised. METHODS: Preliminarily to this clinical study, a comparative geometrical analysis was conducted between various excision shapes and angles using Geometry Pad version 2.7.10 (Bytes Arithmetic LLC) and verifying the data obtained through AutoCAD 2D 2016 (Autodesk, San Rafael, CA, USA), with the purpose of optimizing the technique from a geometrical point of view. A comparison was performed between the theoretical traditional elliptical excision and the hypothetical parallelogram excision. A pilot proof of concept clinical study was performed to verify the validity of the excisional design proposed. The patients considered for parallelogram excision suffered from skin lesions with a diameter no greater than 4 cm and oriented 45° to 60° with respect to tension lines. In order to limit variability, patients' ages were between 40 and 80, and the selected areas were limbs, sternum and dorsum. Scar quality was assessed with the validated POSAS method at 6 months post-operation. RESULTS: The geometrical analysis of the parallelogram's design showed that it allows a diminution of the excised healthy skin compared to the traditional ellipse. The clinical series included 16 patients, with a mean age of 63.5. Of these, nine patients were men and seven were women. Diagnoses included basal cell carcinoma in seven cases, dysplastic naevus in five patients, Bowen's disease in three individuals, and one case where a wider excision of a malignant melanoma was performed. Six-month follow up results showed: (1) an uneventful postoperative course; (2) good scar healing with an observer's POSAS median score of 16 and a patient's POSAS median score of 19; and (3) complete excision of lesions. CONCLUSIONS: When indicated, the parallelogram excision technique appears to be a good option for the excision and primary closure of skin lesions that are not parallel to skin tension lines, since it allows a reproducible and surgeon-friendly method of preoperative marking and implies a favorable use of the local tension, which determines good quality scars. The amount of healthy tissue removed is smaller compared to traditional elliptic excisions.
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INTRODUCTION: Venous congestion burdens up to 15% of deep inferior epigastric artery perforator (DIEP) flap breast reconstructions. For these cases, venous augmentation by superficial outside shunt (SOS) is associated with 100% success in secondary salvage surgeries. Intraoperative venous augmentation using other techniques yields a 0.3% rate of return to theater due to venous congestion, but there is no evidence assessing the effectiveness of the SOS technique applied preventively. Comparing this preventive approach to data prior to its implementation, we expect to find a reduced number of venous congested flaps with reduced flap losses and revision surgeries. PATIENTS AND METHODS: This retrospective cross-sectional study involved DIEP flap breast reconstructions performed between 2011 and 2020. The control group included patients receiving additional venous anastomosis as a secondary salvage procedure. The "preventive SOS group" included patients who received preventive SOS during the main surgery. Age, body mass index (BMI), pregnancies, perioperative treatments (neoadjuvant or adjuvant chemo or radiotherapy), follow-up complications (arterial ischemia, venous congestion, hematomas, partial/total flap loss), and revision surgeries (breast debridement, flap remodeling) were recorded and compared. RESULTS: Within 695 flaps performed, 397 flaps were included in the control group, and 298 flaps were included in the preventive SOS group. The groups were homogeneous for age (p = 0.418), BMI (p = 0.747), and flap weight (p = 0.064). Fifty-one flaps (12.8%) in the control group compared to zero (0.0%) in the preventive SOS group required return to theater (p < 0.001). CONCLUSIONS: We reported encouraging preliminary results for SOS to prevent DIEP flap venous congestion. These results must be validated prospectively.
Subject(s)
Hyperemia , Mammaplasty , Perforator Flap , Humans , Retrospective Studies , Hyperemia/etiology , Hyperemia/surgery , Hyperemia/prevention & control , Cross-Sectional Studies , Incidence , Mammaplasty/adverse effects , Mammaplasty/methods , Perforator Flap/blood supply , Epigastric Arteries/surgeryABSTRACT
BACKGROUND: The elbow area is frequently affected by excessive sagging skin post-massive weight loss. The aim of this study is to present a brachioplasty with distal extension of incision to the anticubital surface, in order to make the transition from middle arm to distal arm/elbow more nuanced and aesthetically pleasing. MATERIAL AND METHODS: An observational retrospective comparative study was performed confronting two groups of female patients. All patients treated with brachioplasty between January 2015 and December 2020 due to brachial laxity following massive weight loss were included in the study. Group A consisted of patients who underwent the novel procedure and Group B comprised subjects with the standard brachioplasty technique. Demographics, including age, BMI and comorbidities were taken into account. The mean outcome measure was the Body-QTM-satisfaction with upper arms score, which was administered preoperatively and one year postoperatively. RESULTS: In the period considered, Group A consisted of 92 patients and Group B of 78. No difference was found between groups concerning BMI and age. The groups were comparable also based on the Body-Q pre-surgery levels. The Body-Q scores at one year postoperatively were 22.80 ± 2.28 in group A and 19.50 ± 2.42 in group B. The postoperative Body-Q scores across the two groups were a higher in group A, and the result is statistically significant (p < 0.05). CONCLUSION: The utilization of the proposed elbow-extended technique allows an improvement of the upper limb profile, with far higher satisfaction of patients, at the price of minimal sequelae in terms of scar. The elbow area is a critical part in post-obese deformities of the brachium, and is frequently neglected. In case of skin laxity and redundancy an elbow extension of the brachioplasty incision is indicated. Results of elbow-extended brachioplasty are p valid and the additional scar well concealed and accepted by patients. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
Subject(s)
Cicatrix , Elbow , Humans , Female , Elbow/surgery , Retrospective Studies , Arm/surgery , Weight Loss , Treatment OutcomeABSTRACT
BACKGROUND: Pharyngoesophageal reconstruction with the tubed anterolateral thigh (ALT) flap is burdened by possible strictures and pharyngocutaneous fistulae (PCF). We present our experience with the U-shaped insetting of perforator-based chimeric ALT flap focusing on surgical technique, complications and functional outcomes. METHODS: We retrospectively included 10 patients with a total circumferential defect of the hypopharynx undergoing reconstruction with ALT flap. A perforator-based chimeric ALT flap with two independent skin paddles was harvested: the trapezoid paddle with the greater base cranially and the height oriented vertically was used for pharyngoesophageal reconstruction while the second paddle was exteriorized and used for flap monitoring and reducing tension on skin closure. Mean age was 56.4 years. Eight patients were affected by squamous cell carcinoma. Modified barium swallow radiogram and fiberoptic laryngoscopy were performed to assess strictures and PCFs. Swallowing and speech outcomes were evaluated through the Deglutition Handicap Index (DHI), M.D. Anderson Dysphagia Inventory (MDADI) and Voice Handicap Index (VHI) questionnaires. RESULTS: Mean flap dimension was 7.9 × 6 × 9.2 cm. Mean ischemia time was 58.2 min (range 42-80). No flap loss nor flap-related complications were reported. Two PCFs were observed. Fiberoptic laryngoscopy documented a complete integration of the flap with no strictures or stenosis. Mean follow-up was 13.6 months (range 1-45 months). Mean DHI score was 33.8, mean MDADI score was 62.5, mean VHI score was 32.2. CONCLUSIONS: The ALT flap U-shaped insetting is a reliable option for pharyngoesophageal reconstruction yielding a high success rate, low number of strictures and fistulae and good swallowing and voice outcomes.
Subject(s)
Perforator Flap , Plastic Surgery Procedures , Humans , Middle Aged , Thigh/surgery , Retrospective Studies , Lower Extremity/surgery , Perforator Flap/surgery , Treatment OutcomeABSTRACT
An underdosing of collagenase clostridium histolyticum (0.32 mg) is proposed as a potentially effective option in patients with additional cords in the same hand, after the first cord has been treated with the regular dose of 0.58 mg. The aim of this study was to analyze whether this additional dose is tolerated and effective. Methods: Patients with Dupuytren's disease affecting MCP joints with at least two independent pathological cords, causing deformity of two digits, were considered, with their written informed consent, for a simultaneous injection of the two cords with a single vial of collagenase. Digits treated with the standard dose of 0.58 mg were compared with digits injected with the smaller dose of 0.32 mg. Passive extension deficit and range of motion were evaluated after injection. Complications were also compared. Results: A total of 26 patients (29 hands) were included in the study. Of these, nine patients had two independent cords within one hand, and 17 patients had a single cord (three of these with a cord in each hand). Thirty-five digits were injected, 23 with 0.58 mg and 12 with 0.32 mg. Apart from a smaller mean percentage variation in passive extension deficit within 24 hours in the 0.58-mg dose compared with 0.32 mg (29% versus 40%, P = 0.031), no other differences emerged if a dose of 0.32 mg is used instead of 0.58 mg, in terms of selected outcome measures and rate of complications (P > 0.05). Conclusion: Underdosing collagenase clostridium histolyticum is equally effective in the treatment of Dupuytren's disease.
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The profunda femoris artery perforator (PAP) flap has been recently popularized as an alternative option for microsurgical reconstruction. The use of PAP flap has never been reported and described for reconstruction of the upper extremities, in particular the forearm. The purpose of this case report is to describe a case suggesting the PAP flap as a further reconstructive option in the upper limb. A 16-year-old girl who sustained a traumatic injury to her right dominant forearm resulting in subtotal circumferential tissue loss following a road traffic accident was referred to the authors' department 2 years post-trauma. The disabling fibrotic sequelae on her volar forearm (15 × 10 cm) resulted in a nonfunctional hand. She was unable to perform any active movement of her wrist or digits. Passive movements in the finger joints were preserved. Following debridement and reconstruction of nerves and tendons, soft tissues were resurfaced with a PAP flap. The transverse skin paddle, 12 × 7 cm, was placed distally with the adipofascial portion positioned proximally above the muscle bellies and anastomoses site. A small raw area (4 × 3 cm) was covered with an acellular dermal matrix (ADM). The postoperative course was uneventful. At 9 months postoperatively, the patient demonstrated active flexion and extension of the fingers with independent function. The patient reported satisfaction with the flap donor site and forearm resurfacing. The PAP flap can be a further option for areas requiring soft tissue coverage in patients refusing visible scars. This flap had both the advantage of reducing the morbidity and visibility of the donor site, as well as the ability to resurface a large recipient site with soft and pliable tissue, covering exposed nerves and tendons.
Subject(s)
Mammaplasty , Perforator Flap , Plastic Surgery Procedures , Soft Tissue Injuries , Adolescent , Female , Femoral Artery/surgery , Forearm/surgery , Humans , Mammaplasty/methods , Perforator Flap/blood supply , Plastic Surgery Procedures/methods , Soft Tissue Injuries/etiology , Soft Tissue Injuries/surgery , Thigh/surgeryABSTRACT
Defects of the peripheral nervous system are extremely frequent in trauma and surgeries and have high socioeconomic costs. If the direct suture of a lesion is not possible, i.e., nerve gap > 2 cm, it is necessary to use grafts. While the gold standard is the autograft, it has disadvantages related to its harvesting, with an inevitable functional deficit and further morbidity. An alternative to autografting is represented by the acellular nerve allograft (ANA), which avoids disadvantages of autograft harvesting and fresh allograft rejection. In this research, the authors intend to transfer to human nerves a novel technique, previously implemented in animal models, to decellularize nerves. The new method is based on soaking the nerve tissues in decellularizing solutions while associating ultrasounds and freeze-thaw cycles. It is performed without interrupting the sterility chain, so that the new graft may not require post-production γ-ray irradiation, which is suspected to affect the structural and functional quality of tissues. The new method is rapid, safe, and inexpensive if compared with available commercial ANAs. Histology and immunohistochemistry have been adopted to evaluate the new decellularized nerves. The study shows that the new method can be applied to human nerve samples, obtaining similar, and, sometimes better, results compared with the chosen control method, the Hudson technique.
Subject(s)
Nerve Tissue/cytology , Tissue and Organ Harvesting/methods , Aged , Autopsy , Female , Humans , Male , Middle Aged , Nerve Regeneration , Nerve Tissue/transplantation , Sonication , Time Factors , Transplantation, HomologousABSTRACT
Musculoskeletal tumors of the hand are a rare entity and are divided into skeletal and soft tissue tumors. Either category comprises benign and malignant or even intermediate tumors. Basic radiology allows an optimal resolution of bone and related soft tissue areas, ultrasound and more sophisticated radiologic tools such as scintigraphy, CT and MRI allow a more accurate evaluation of tumor extent. Enchondroma is the most common benign tumor affecting bone, whereas chondrosarcoma is the most commonly represented malignant neoplasm localized to hand bones. In the soft tissues, ganglions are the most common benign tumors and epithelioid sarcoma is the most frequently represented malignant tumor targeting hand soft tissues. The knowledge regarding diagnostic and therapeutic management of these tumors is often deriving from small case series, retrospective studies or even case reports. Evidences from prospective studies or controlled trials are limited and for this lack of clear and supported evidences, data from the medical literature on the topic are controversial, in terms of demographics, clinical presentation, diagnosis, prognosis and therapy. The correct recognition of the specific subtype and extension of the tumor through first line and second line radiology is essential for the surgeon, in order to effectively direct the therapeutic decisions.
Subject(s)
Chondrosarcoma , Soft Tissue Neoplasms , Bone and Bones , Humans , Prospective Studies , Retrospective Studies , Soft Tissue Neoplasms/diagnostic imagingSubject(s)
Body Dysmorphic Disorders , Surgery, Plastic , Female , Humans , Motivation , Perception , Vulva/surgerySubject(s)
Exosomes , Adipocytes , Humans , Inflammation , Neovascularization, Pathologic , Stem CellsABSTRACT
BACKGROUND: Face rejuvenation is increasingly challenging because patients request minimally invasive surgery; rapid surgical course and recovery; and fast, tangible, and long-term results. Rejuvenation of face often requires surgery to multiple areas, that is, the lateral face, the midface, the neck, and periorbital areas, in addition to the emerging procedures of face volumizing and biostimulation through fat injection. At our institution, a systematic approach comprising all of these procedures has been developed, with consistent results. OBJECTIVE: The aim of this study was to describe the combination of blepharoplasty, minilift, and Stromal Enriched Lipograft (SEL) for thorough rejuvenation of face and neck regions. METHODS: A prospective study was performed to evaluate outcomes and patient satisfaction with composite face lifting, comprising upper and lower blepharoplasties, minilift, and SEL in 210 patients between 2009 and 2018. Overall improvement after the procedure was rated on a scale of 1 to 5, where 1 is "poor," 2 is "fair," 3 is "good," 4 is "very good," and 5 is "excellent." The evaluation was expressed at 6 months postoperatively by the patient. RESULTS: The amount of SEL transplanted varied from 22 to 56 mL per side (mean, 41). There were no cases of liponecrosis, infection of the grafted area, or pulmonary embolism. More than 85% of patients expressed a very good to excellent evaluation of the result obtained. No one expressed a degree of satisfaction less than good. CONCLUSIONS: Composite face lifting seems as a safe and effective combined procedure for the rejuvenation of face. Face harmony not only depends on redraping tissues toward a more natural, tense, and young conformation, but also on restoring volumes and improving the quality of the redraped tissues. More research is necessary, but the preliminary encouraging impression is that the composite face lifting is capable of addressing all issues, the necessity of correcting laxity, filling volumes, and improving the quality of cutaneous tissues.
Subject(s)
Blepharoplasty , Rhytidoplasty , Eyelids/surgery , Humans , Prospective Studies , Rejuvenation , Retrospective StudiesABSTRACT
INTRODUCTION: Nerve repair poses a significant surgical challenge, and much research on this topic for improvement in reconstruction of segmental defects is ongoing. The aims of the study were to reconfirm the accuracy and safety of a previously described nerve decellularization method on a larger experimental population of rabbits, as well as on human nerves, and to establish in vivo the efficacy of a new-concept mixed graft, comprising autologous and acellular nerve allograft components within the same graft. METHODS: Acellular nerve allografts were implanted into tibial nerve defects of 5 rabbits (group A), autografts were implanted, representing the criterion standard, in other 5 animals (group B), and the innovative technique was used in the remaining 5 (group C). Twelve weeks postoperatively, nerve conduction evaluations were performed; animals were euthanatized, and grafts were harvested and morphologically, histomorphometrically, and immunohistochemically analyzed. Eventually, a preliminary in vitro validation of the decellularization method was performed on human nerves from a cadaver. RESULTS: No clinical adverse effect was revealed during all the experimental times. No tissue reaction was observed, and in all groups, regenerated fascicles and bundles were shown by histology. However, both histology and histomorphometry demonstrated a better regenerative efficiency in group C. The morphological evaluation of the human nerve treated with the novel method showed complete decellularization. CONCLUSION: The microsurgical combined model demonstrated a better neuroregeneration than did pure autografts and acellular nerve allografts. The decellularization method seemed effective also on human nerves. Deeper investigations are necessary to further validate and transfer this new encouraging protocol to the clinical arena.
Subject(s)
Nerve Regeneration , Peripheral Nerves/physiology , Peripheral Nerves/surgery , Allografts , Animals , Autografts , Humans , Male , Neurosurgical Procedures/methods , Rabbits , Transplantation, Homologous/methodsABSTRACT
INTRODUCTION: Abdominoplasty is one of the most popular body-contouring procedures. Despite its popularity, classic abdominoplasty is still associated with a significant rate of complaints from patients such as: fullness of flanks and epigastric areas, lack of a posterior lumbar curve, hanging skin over the incision line, and visible scars over the flanks and beyond underwear or swimming suit coverage. This study reviews the authors' experience in redo abdominoplasty when the patient is not or partially satisfied with the primary procedure. PATIENTS AND METHODS: A total of 115 female and 32 male patients underwent revision abdominoplasty with truncal liposculpting between 2007 and 2016. The age distribution of patients ranged from 33 to 73 years, with a mean of 43.1 years. All the patients included in the study had undergone classic abdominoplasty in a different institution. Overall satisfaction with the body appearance after the combined procedure was rated on a scale of 1-5, where 1 is 'poor,' 2 is 'fair,' 3 is 'good,' 4 is 'very good,' and 5 is 'excellent.' The evaluation was made 12 months after the composite body-contouring procedure. RESULTS: Four hundred to 1500 ml of fat were obtained with liposuction (mean 840 ml). The amount of clean, adipose tissue transplanted to the buttocks varied from 95 to 425 (mean 286 ml) and to the lower limbs from 75 to 270 ml (mean 195 ml). The stromal-enriched lipograft technique was used in all the cases to enrich the fat transplantation. There was no hematoma, infection or deep vein thrombosis. Seventy-five percent reported that their appearance after composite body contouring was 'very good' to 'excellent' (30% 'excellent' and 45% 'very good') and 20% responded that their appearance was 'good.' Only 5% of patients thought their appearance was less than good ('fair'). The average follow-up time for this group of patients has been 6.3 years (range 1-10 years). CONCLUSION: Truncal liposculpting with modified abdominoplasty accomplishes very good aesthetic results in a single surgical procedure with a low rate of complications and high patient satisfaction in cases of revision abdominoplasties. LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to Table of Contents or the online Instructions to Authors www.springer.com/00266 .