RESUMEN
KEY POINTS: Several distinct strategies produce and conserve heat to maintain the body temperature of mammals, each associated with unique physiologies, with consequences for wellness and disease susceptibility Highly regulated properties of skin offset the total requirement for heat production We hypothesize that the adipose component of skin is primarily responsible for modulating heat flux; here we evaluate the relative regulation of adipose depots in mouse and human, to test their recruitment to heat production and conservation We found that insulating mouse dermal white adipose tissue accumulates in response to environmentally and genetically induced cool stress; this layer is one of two adipose depots closely apposed to mouse skin, where the subcutaneous mammary gland fat pads are actively recruited to heat production In contrast, the body-wide adipose depot associated with human skin produces heat directly, potentially creating an alternative to the centrally regulated brown adipose tissue ABSTRACT: Mammalian skin impacts metabolic efficiency system-wide, controlling the rate of heat loss and consequent heat production. Here we compare the unique fat depots associated with mouse and human skin, to determine whether they have corresponding functions and regulation. For humans, we assay a skin-associated fat (SAF) body-wide depot to distinguish it from the subcutaneous fat pads characteristic of the abdomen and upper limbs. We show that the thickness of SAF is not related to general adiposity; it is much thicker (1.6-fold) in women than men, and highly subject-specific. We used molecular and cellular assays of ß-adrenergic-induced lipolysis and found that dermal white adipose tissue (dWAT) in mice is resistant to lipolysis; in contrast, the body-wide human SAF depot becomes lipolytic, generating heat in response to ß-adrenergic stimulation. In mice challenged to make more heat to maintain body temperature (either environmentally or genetically), there is a compensatory increase in thickness of dWAT: a corresponding ß-adrenergic stimulation of human skin adipose (in vivo or in explant) depletes adipocyte lipid content. We summarize the regulation of skin-associated adipocytes by age, sex and adiposity, for both species. We conclude that the body-wide dWAT depot of mice shows unique regulation that enables it to be deployed for heat preservation; combined with the actively lipolytic subcutaneous mammary fat pads they enable thermal defence. The adipose tissue that covers human subjects produces heat directly, providing an alternative to the brown adipose tissues.
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Tejido Adiposo Pardo , Termogénesis , Tejido Adiposo Pardo/fisiología , Tejido Adiposo Blanco/metabolismo , Animales , Femenino , Humanos , Lipólisis , Grasa Subcutánea/metabolismo , Termogénesis/fisiologíaRESUMEN
BACKGROUND: Few studies have examined the impact of abdominoplasty on chronic back pain. OBJECTIVES: The aim of this study was to test our hypothesis that patients undergoing abdominoplasty with anterior abdominal wall plication will show significant improvements in back pain and physical function compared with those without plication. METHODS: We utilized Current Procedural Terminology (CPT) codes to identify patients who underwent abdominoplasty with the senior author over a 10-year period. The Oswestry Disability Index (ODI) and the RAND 36-Item Short-Form Health Survey (SF-36) were administered. All patients indicating preoperative back pain were reviewed. RESULTS: Of 338 patients, 143 surveys (42.3%) were returned; 51 patients (35.7%; nâ =â 28 aesthetic, nâ =â 23 massive weight loss) reported preoperative back pain on the ODI. Paired t tests compared overall and strata-specific changes in ODI and SF-36 pre- and postsurgery. Multivariable linear regression models were fitted to model relations between scores and plication, adjusting for presurgery scores and patient variables. There were significant improvements in overall patient cohort in ODI (-15.14), SF-36 physical function (19.92), and pain (17.42) (Pâ <â 0.001), as well as when patients were stratified by plication status. However, outcomes between those with plication and those without were not significantly different. CONCLUSIONS: Abdominoplasty with and without anterior abdominal wall plication significantly improves ODI and SF-36 scores relating to physical function and pain, in both aesthetic and massive weight loss patients. Outcomes did not differ based on plication status. All patients with preoperative back pain showed improvement regardless of operation performed, suggesting that abdominoplasty with or without abdominal wall plication improves chronic back pain in this patient population.
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Abdominoplastia , Cirujanos , Abdominoplastia/efectos adversos , Dolor de Espalda/etiología , Dolor de Espalda/cirugía , Humanos , Dimensión del Dolor , Encuestas y Cuestionarios , Resultado del TratamientoRESUMEN
BACKGROUND: Adult acquired buried penis syndrome may be associated with an inability to void, sexual dysfunction, and recurrent infection. Previously published classification systems rely on intraoperative findings, such as penile skin quality. OBJECTIVES: The purpose of this study was to evaluate outcomes after adult acquired buried penis repair and to develop a classification system based on preoperative assessment. METHODS: The authors reviewed data from patients who underwent buried penis reconstruction at a single institution. Patient history and physical examination guided the development of a classification system for surgical planning. RESULTS: Of the 27 patients included, the mean age was 56 ± 15 years and mean body mass index was 49 ± 14 kg/m2. Patients were classified into 4 groups based on examination findings: (I) buried penis due to skin deficiency, iatrogenic scarring, and/or diseased penile skin (n = 3); (II) excess abdominal skin and fat (n = 6); (III) excess skin and fat with diseased penile skin (n = 16); and (IV) type III plus severe scrotal edema (n = 2). Surgical treatment (eg, excision and grafting, mons suspension, panniculectomy, translocation of testes, and/or scrotectomy) was tailored based on classification. Complications included wound breakdown (n = 3), cellulitis (n = 4), and hematoma (n = 1). Nearly all patients (96%) reported early satisfaction and improvement in their symptoms postoperatively. CONCLUSIONS: Classifying patients with buried penis according to preoperative examination findings may guide surgical decision-making and preoperative counseling and allow for optimized aesthetics to enhance self-esteem and sexual well-being.
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Abdominoplastia/métodos , Enfermedades del Pene/clasificación , Pene/cirugía , Procedimientos de Cirugía Plástica/métodos , Escroto/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Índice de Masa Corporal , Toma de Decisiones Clínicas/métodos , Humanos , Masculino , Persona de Mediana Edad , Enfermedades del Pene/cirugía , Periodo Preoperatorio , Trasplante de Piel/métodos , Síndrome , Resultado del Tratamiento , Adulto JovenRESUMEN
BACKGROUND: The development of simulation, particularly low-cost models, has become a focus of interest within plastic surgery education. Current simulators for Mohs reconstruction are either expensive or not reusable. The authors hypothesize that using a Styrofoam head model during an interactive teaching session will positively affect plastic surgery trainee comfort in designing Mohs reconstructive options. METHODS: A cohort of integrated plastic surgery residents at a single institution performed a preactivity questionnaire to obtain baseline comfort in defect assessment and design for five Mohs defects. They subsequently underwent an interactive learning session and were instructed to design flaps on life-size Styrofoam heads with feedback from the senior author (M.L.B.). A postactivity questionnaire was completed to assess improvement in comfort in defect assessment and flap design. Three attending surgeons then compared trainee designs with the senior author's design to assess accuracy. All surveys were based on a five-point Likert scale. RESULTS: When analyzing all defects, average postactivity scores increased by 0.63 (SD, ±0.24) ( P = 0.008). Junior residents ( n = 8) had a greater increase in average score responses [mean, 1.07 (0.5 to 1.75)] compared with senior residents ( n = 9) [mean, 0.27 (0 to 1)] ( P < 0.001). When assessed by senior-level surgeons, senior residents had significantly greater accuracy in design for each defect ( P < 0.05) except cheek advancement flap ( P = 0.08). CONCLUSION: Participation in an interactive educational activity using a Styrofoam head model demonstrated significant improvements in trainee assessment and design of reconstructive options for Mohs defects.
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Internado y Residencia , Procedimientos de Cirugía Plástica , Cirugía Plástica , Humanos , Colgajos Quirúrgicos , Cirugía de Mohs/métodosRESUMEN
SUMMARY: Patient demand for nonsurgical and minimally invasive cosmetic treatments has increased in recent years, resulting in a growing market that is particularly vulnerable to specialty creep. Despite this growing demand, nonsurgical cosmetic training for plastic surgery residents is often inconsistent and challenging. To ensure the continued safe and effective delivery of nonsurgical cosmetic care by board-certified plastic surgeons, it is critical to implement standardized training models for plastic surgery residents. In this Special Topic article, the authors describe their experience with a resident-run clinic training model that incorporates graduated autonomy, volunteer patient recruitment, and grant-based industry support that has been successfully implemented at their institution for the past 6 years. The article provides a framework for a resident educational model and addresses common obstacles in resident cosmetic training. The authors also provide recommendations for patient recruitment, optimizing clinic workflow, and the management of patient complications.
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Internado y Residencia , Procedimientos de Cirugía Plástica , Clínica Administrada por Estudiantes , Cirujanos , Cirugía Plástica , Humanos , Procedimientos de Cirugía Plástica/educación , Cirugía Plástica/educaciónRESUMEN
BACKGROUND: Hemifacial atrophy (Parry-Romberg syndrome) is an enigmatic craniofacial disorder characterized by progressive facial atrophy. Early age at onset is associated with significant skeletal involvement and jaw abnormalities. Standard reconstructive dogma dictates that the disease should "burn out," with at least 2 years of no disease progression, before pursuing reconstructive intervention. The purpose of this article is to present the senior author's (J.W.S.) experience treating preadolescent children with free soft-tissue transfer for reconstruction of progressing hemifacial atrophy, and to review surgical techniques in this patient population. METHODS: Pediatric free tissue transfer cases performed by the senior author were reviewed. Free tissue transfer using a circumflex scapular adipofasciocutaneous flap was performed to treat deformities arising from hemifacial atrophy. RESULTS: Thirty-six patients aged 3 to 6 years underwent free tissue transfer in the presence of progressing, active disease. Follow-up ranged from 7 months to 25 years. There were no cases of flap loss. In all patients, the disease process seemed to be altered, with no symptoms recurring to date. CONCLUSIONS: The authors believe that early microsurgical correction of hemifacial atrophy in children as young as 3 years is reliable and effective. The authors theorize that the interposition of vascularized, healthy tissue may alter or even halt the progression of disease, and may also prevent the skeletal hypoplasia classically seen in older patients. Further study incorporating autologous fat grafting as a control procedure may provide additional insight into this challenging disease process. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.
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Hemiatrofia Facial/cirugía , Colgajos Tisulares Libres , Niño , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Masculino , Microcirugia/métodos , Resultado del TratamientoRESUMEN
Extracellular functions of the endoplasmic reticulum chaperone protein calreticulin (CRT) are emerging. Here we show novel roles for exogenous CRT in both cutaneous wound healing and diverse processes associated with repair. Compared with platelet-derived growth factor-BB-treated controls, topical application of CRT to porcine excisional wounds enhanced the rate of wound re-epithelialization. In both normal and steroid-impaired pigs, CRT increased granulation tissue formation. Immunohistochemical analyses of the wounds 5 and 10 days after injury revealed marked up-regulation of transforming growth factor-beta3 (a key regulator of wound healing), a threefold increase in macrophage influx, and an increase in the cellular proliferation of basal keratinocytes of the new epidermis and of cells of the neodermis. In vitro studies confirmed that CRT induced a greater than twofold increase in the cellular proliferation of primary human keratinocytes, fibroblasts, and microvascular endothelial cells (with 100 pg/ml, 100 ng/ml, and 1.0 pg/ml, respectively). Moreover, using a scratch plate assay, CRT maximally induced the cellular migration of keratinocytes and fibroblasts (with 10 pg/ml and 1 ng/ml, respectively). In addition, CRT induced concentration-dependent migration of keratinocytes, fibroblasts macrophages, and monocytes in chamber assays. These in vitro bioactivities provide mechanistic support for the positive biological effects of CRT observed on both the epidermis and dermis of wounds in vivo, underscoring a significant role for CRT in the repair of cutaneous wounds.
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Calreticulina/metabolismo , Cicatrización de Heridas/fisiología , Animales , Movimiento Celular/fisiología , Proliferación Celular , Células Cultivadas , Tejido de Granulación/metabolismo , Humanos , Inmunohistoquímica , Queratinocitos/metabolismo , Macrófagos/metabolismo , Conejos , Porcinos , Factor de Crecimiento Transformador beta/biosíntesisRESUMEN
BACKGROUND: Parry Romberg disease (hemifacial atrophy) and linear scleroderma (coup de sabre) are progressive, usually unilateral facial atrophies of unknown cause. The gold standard treatment for these patients has been microsurgical reconstruction following the "burning out" of the facial atrophy and stable contour for 2 years. METHODS: The authors report their experience treating patients with hemifacial atrophy and linear scleroderma with free tissue transfers between 1989 and 2016. A modified parascapular flap based on the circumflex scapular artery was most commonly used. RESULTS: A total of 177 patients were included. The most common complication was hematoma, occurring in 12 patients (7 percent). Follow-up ranged from 1 to 26 years. All patients subjectively experienced improved facial symmetry and aesthetics. No disease process has recurred to date, even in cases of severe, progressive disease. CONCLUSIONS: In the authors' experience, patients treated early in their disease course have immediate and sustained correction of their deformity, with slowing or in most cases cessation of the disease process following free tissue transfer. The authors now advocate for immediate reconstruction for active disease, especially in young children. CLINICAL QUESTIONS/LEVEL OF EVIDENCE: Therapeutic, IV.
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Hemiatrofia Facial/cirugía , Colgajos Tisulares Libres/trasplante , Microcirugia/métodos , Esclerodermia Localizada/cirugía , Trasplante de Piel/métodos , Adolescente , Adulto , Anciano , Niño , Preescolar , Estética , Asimetría Facial/cirugía , Femenino , Colgajos Tisulares Libres/irrigación sanguínea , Humanos , Labio/cirugía , Persona de Mediana Edad , Complicaciones Posoperatorias/etiología , Cuidados Preoperatorios/métodos , Resultado del Tratamiento , Adulto JovenRESUMEN
BACKGROUND: Parry-Romberg syndrome is an enigmatic craniofacial disorder characterized by progressive facial atrophy. The pathogenesis and molecular mechanisms governing Parry-Romberg syndrome have never before been described. The purpose of the current study was twofold: (1) to begin to elucidate the pathophysiology of this disease using next-generation RNA sequencing and (2) to evaluate the effect of surgical treatment on gene expression. METHODS: Patients with Parry-Romberg syndrome underwent microvascular free tissue transfer to the face to address contour deformity in both active and burned out disease. Tissue samples were collected for analysis at the time of initial microvascular free tissue transfer, and 6 months later at a scheduled revision operation. Patients presenting for rhytidectomy had tissue samples taken as control tissue. Samples from patients with disease were compared to control samples. RESULTS: Twenty-two subjects were evaluated (six control and 16 Parry-Romberg syndrome patients). All patients with Parry-Romberg syndrome underwent microvascular free tissue transfer to the face. Thirteen patients underwent scheduled 6-month revision surgery. Disease samples were distinct from healthy controls, and postoperative patient samples were more similar to healthy control samples. Parry-Romberg syndrome patients had a unique proinflammatory gene expression profile, including up-regulation of IL24, ADAMTS4, and GFCSF3. Postoperatively, more than 3400 genes were changed (p < 0.005), and of the 460 genes dysregulated in disease, 118 were changed in a corrective fashion by microvascular free tissue transfer. CONCLUSIONS: The authors describe for the first time molecular signatures in Parry-Romberg syndrome. Molecular signatures in skin became more similar to those in healthy controls and were associated with clinical improvement after microvascular free tissue transfer in Parry-Romberg syndrome.
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Hemiatrofia Facial/cirugía , Perfilación de la Expresión Génica , Microvasos/cirugía , Procedimientos de Cirugía Plástica , Piel/patología , Proteína ADAMTS4/metabolismo , Tejido Adiposo , Biopsia , Regulación hacia Abajo , Hemiatrofia Facial/etiología , Hemiatrofia Facial/patología , Colgajos Tisulares Libres/trasplante , Factor Estimulante de Colonias de Granulocitos/metabolismo , Secuenciación de Nucleótidos de Alto Rendimiento , Humanos , Interleucinas/metabolismo , Estudios Prospectivos , Reoperación , Análisis de Secuencia de ARN , Regulación hacia ArribaRESUMEN
BACKGROUND: Free tissue transfer to improve bulk and contour in facial deformities has been proven useful, yet refinements that turn an acceptable result into an excellent result are essential to reconstruction. The authors reviewed their experience and described these refinements. METHODS: The charts of 371 free tissue transfer cases (1989 to 2010) performed by the senior author (J.W.S.) were reviewed. Free tissue transfer of a circumflex scapular variant flap or superficial inferior epigastric was performed to treat deformities arising from hemifacial atrophy (n = 126), hemifacial microsomia (n = 89), radiation therapy (n = 40), bilateral malformations including lupus and polymyositis (n = 50), other congenital anomalies (n = 25), facial palsy (n = 17), and burns and trauma (n = 24). RESULTS: Revision surgery planning began at initial flap operation where the flap was stretched maximally and interdigitated with recipient tissue. More tissue was required in the malar region. Revision refinement was indicated in all cases (after 6 months). Flap revision involved liposuction, debulking, reelevation, and release of tethering, followed by tissue rearrangement by means of advancement, rotation, transposition, and/or turnover flaps of subcutaneous tissues from the previous free flap. The jawline frequently required more debulking. Periorbital reconstruction was combined with lower lid support with or without canthal repositioning. Conventional face-lift techniques with the flap as superficial musculoaponeurotic system augmented the result. Autologous fat injection to the alar rim, medial canthus, upper eyelid, and lip was a useful adjunct. Severe lip deficiencies were addressed with local flaps. CONCLUSION: The keys to improving results were continual critical reassessment, open-mindedness to new approaches, and maintaining high expectations. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, V.
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Cara/cirugía , Colgajos Tisulares Libres , Microcirugia/métodos , Procedimientos de Cirugía Plástica/métodos , Tejido Adiposo Blanco/trasplante , Adolescente , Adulto , Blefaroplastia , Estética , Cara/patología , Traumatismos Faciales/cirugía , Femenino , Humanos , Lipectomía , Masculino , Satisfacción del Paciente , Reoperación , Rinoplastia , Ritidoplastia , Resultado del Tratamiento , Adulto JovenRESUMEN
BACKGROUND: Since their first review of microsurgical correction of facial contour deformities in 19 patients with craniofacial malformations, the authors have treated an additional 74 patients (n = 93). The authors review indications, choices, safety, efficacy, complications, and technical refinements. A treatment algorithm is presented. METHODS: A retrospective chart review of all patients who underwent microvascular reconstruction of the face and all patients with craniofacial dysmorphology was performed. Between 1989 and 2004, a total of 93 patients with the following diagnoses were identified: craniofacial microsomia (n = 73), Treacher Collins syndrome (n = 8), and severe orbitofacial cleft (n = 12). All patients underwent microsurgical facial reconstruction with a superficial inferior epigastric, groin, or circumflex scapular flap. Flap revisions, complications, and non-free flap related surgery were reviewed. RESULTS: The mean age at microvascular reconstruction was 11 years (range, 4 to 27 years). Flap choices included the following: superficial inferior epigastric (n = 4), groin (n = 3), and circumflex scapular (n = 105). Seventy-six patients underwent unilateral and 17 patients underwent bilateral (one of 17 simultaneous) reconstructions. Postoperative complications included partial flap loss (n = 1), reexploration (n = 1), hematoma (n = 5), and cellulitis (n = 5). All patients had subjective improvement in facial contour, symmetry, skin tone, and color. Most patients underwent additional non-free flap procedures including mandibular distraction and ear reconstruction. CONCLUSIONS: Microsurgical flaps have markedly improved the authors' ability to restore craniofacial contour in patients with craniofacial malformations. In selected patients, the authors choose primary midface augmentation with free vascularized tissue to restore form and function. Microsurgical flaps in patients with craniofacial malformations are safe, effective, and reliable.
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Anomalías Craneofaciales/cirugía , Microcirugia/métodos , Procedimientos de Cirugía Plástica/métodos , Colgajos Quirúrgicos/irrigación sanguínea , Adolescente , Adulto , Niño , Preescolar , Estudios de Cohortes , Anomalías Craneofaciales/diagnóstico , Estética , Cara/anomalías , Cara/cirugía , Huesos Faciales/cirugía , Femenino , Humanos , Masculino , Pronóstico , Estudios Retrospectivos , Medición de Riesgo , Resultado del Tratamiento , Cicatrización de HeridasRESUMEN
BACKGROUND: Free tissue transfer for adult mandibular reconstruction is a well-established technique; however, there are few reports of pediatric microvascular lower jaw reconstruction. METHODS: This retrospective study was undertaken to review the range of indications, choices, safety, and efficacy of pediatric free tissue transfer to the lower jaw. All patients underwent a parascapular, scapular, or fibula free tissue transfer. Flap choice was based on preoperative clinical examination, radiographic findings, need for linear or multiplanar mandibular reconstruction, need for dental restoration, severity of soft-tissue deficit, and peroneal artery anatomy. RESULTS: Over a 10-year period (1989 to 1999), we performed eight free tissue transfers to reconstruct the mandibles of seven children, aged 6 to 17 years. Indications included radiation-induced hypoplasia (n = 1), postsurgical resection of fibrous dysplasia (n = 1), hemifacial microsomia (n = 3), Robin sequence with severe micrognathia (n = 1), and osteomyelitis (n = 1). The authors transferred four parascapular osseocutaneous, two scapular osseocutaneous, one fibular osseocutaneous, and one fibular osseous flap to reconstruct five ramus, four condyle, and two subtotal mandibular defects. All bony defects were successfully bridged and all osseous flaps successfully integrated. Postoperatively, mandibular symmetry and Angle class I occlusion were restored in all patients throughout the 10.5-year follow-up period (range, 9 to 14 years). Two patients received osseointegrated dental implants. Our only complication was the partial loss of a skin paddle. CONCLUSION: Microvascular reconstruction of the pediatric mandible, in selected patients, is a safe, reliable procedure that provides the bone stock and soft tissue necessary to restore normal maxillomandibular growth and dental rehabilitation.
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Mandíbula/cirugía , Enfermedades Mandibulares/cirugía , Procedimientos de Cirugía Plástica , Colgajos Quirúrgicos , Adolescente , Niño , Femenino , Humanos , Masculino , Microcirculación , Microcirugia , Estudios RetrospectivosRESUMEN
BACKGROUND: Patients with craniofacial anomalies can have hard and soft tissue deficiencies. In some cases, distraction osteogenesis can restore the bony deficiencies, but the soft tissue contour defect remains problematic. For these patients, the union of distraction osteogenesis and microvascular free flaps (MVFF) can restore bone and soft tissue form and function. PATIENTS AND METHODS: A retrospective review of all patients treated with mandibular distraction osteogenesis between 1989 and 2005 was performed. A similar review of all patients treated with MVFFs was performed. These 2 cohorts were cross-referenced to identify all patients treated with both procedures. The indications, choices, safety, and efficacy of MVFF reconstruction of facial soft tissues following mandibular reconstruction are reviewed. RESULTS: Over a 16-year period, 141 patients underwent mandibular distraction osteogenesis; 8 patients treated with mandibular distraction osteogenesis subsequently underwent 12 MVFFs. Patient diagnoses included unilateral craniofacial microsomia (n = 2), bilateral craniofacial microsomia (n = 3), Goldenhar syndrome (n = 1), Nager syndrome (n = 1), and Treacher-Collins syndrome (n = 1). Free flap choices included 10 parascapular fasciocutaneous, 1 parascapular osteofasciocutaneous, and 1 fibular osteocutaneous flap. Four patients underwent staged bilateral free flaps. A single case of partial flap loss was the only complication. In all cases, facial contour was improved following MVFF transfer. CONCLUSIONS: In certain circumstances, facial rehabilitation may require the marriage of craniofacial and microsurgical techniques to restore both form and function. In these cases, mandibular distraction osteogenesis and MVFFs can be safely and effectively combined.
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Anomalías Craneofaciales/cirugía , Cara/cirugía , Microcirugia/métodos , Adolescente , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Masculino , Procedimientos de Cirugía Plástica/métodos , Estudios Retrospectivos , Colgajos QuirúrgicosRESUMEN
INTRODUCTION: Treacher Collins syndrome is an autosomal dominant mandibulofacial dysostosis with characteristic hard- and soft-tissue facial abnormalities. These include ocular malformations, ear malformations, and hypoplasia of the facial skeleton, especially of the malar bones and mandible. Traditionally, surgical correction of the facial abnormalities has focused on skeletal reconstruction to restore facial form and symmetry. In this report, we describe the use of customized parascapular free flaps, after standard reconstructive surgeries, for the correction of defects of facial contour in Treacher Collins patients. In most cases, bony reconstruction of the zygoma or periorbita is not required. METHODS: From June 1995 to December 2003, 8 patients with Treacher Collins syndrome underwent microsurgical correction of facial contour using 16 free flaps. In all patients, staged parascapular free flaps were used for reconstruction. The microvascular technique involved a 2-team approach with simultaneous ipsilateral parascapular flap harvest and facial pocket dissection. The flaps were contoured, revascularized (14 superficial temporal vessels, 2 facial vessels), and inset. No vein grafts were used. The patients were followed for a minimum of 1 year, and postoperative evaluation included medical photography, visual assessment, and evaluation by the patient and family. RESULTS: Seven patients had previous facial skeleton correction using craniofacial techniques. The age at operation ranged from 4-19 years. Sixteen parascapular free flaps were used in the 8 patients. Postoperative complications were limited to 1 hematoma. There were no partial or total flap losses. All of the patients had improved facial contour and symmetry. Overlying skin tone and color similarly improved. CONCLUSION: After traditional skeletal reconstruction for the complex craniofacial defects of Treacher Collins syndrome, deficiencies in facial contour and symmetry usually persist. Customized soft-tissue free flaps can be employed to differentially resurface these defects and achieve optimal esthetic results in these challenging patients.
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Cara/anomalías , Cara/cirugía , Disostosis Mandibulofacial/cirugía , Adolescente , Adulto , Niño , Preescolar , Femenino , HumanosRESUMEN
Calreticulin (CRT), an intracellular chaperone protein crucial for the proper folding and transport of proteins through the endoplasmic reticulum, has more recent acclaim as a critical regulator of extracellular functions, particularly in mediating cellular migration and as a requirement for phagocytosis of apoptotic cells. Consistent with these functions, we show that the topical application of CRT has profound effects on the process of wound healing by causing a dose-dependent increase in epithelial migration and granulation tissue formation in both murine and porcine normal and impaired animal models of skin injury. These effects of CRTare substantiated, in vitro, as we show that CRT strongly induces cell migration/wound closure of human keratinocytes and fibroblasts, using a wound/scratch plate assay, and stimulates cellular proliferation of human keratinocytes, fibroblasts, and vascular endothelial cells, providing mechanistic insight into how CRT functions in repair. Similarly, in both animal models, the histology of the wounds show marked proliferation of basal keratinocytes and dermal fibroblasts, dense cellularity of the dermis with notably increased numbers of macrophages and well-organized collagen fibril deposition. Thus, CRT profoundly affects the wound healing process by recruiting cells essential for repair into the wound, stimulating cell growth, and increasing extracellular matrix production.
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Calreticulina/farmacología , Cicatrización de Heridas/efectos de los fármacos , Animales , Calreticulina/fisiología , Calreticulina/uso terapéutico , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Tejido de Granulación/fisiología , Humanos , Queratinocitos/efectos de los fármacos , Queratinocitos/fisiología , Macrófagos/efectos de los fármacos , Macrófagos/fisiología , Factor A de Crecimiento Endotelial Vascular/farmacología , Cicatrización de Heridas/fisiologíaRESUMEN
BACKGROUND: Silicone, in the form of injectable liquid and prosthetic blocks, has been used to correct facial contour defects. However, silicone also has been associated with many complications including malposition, dyschromia, dysesthesia, contractures, infection, and fistula. Complications related to injectable-liquid and prosthetic-block silicone use in treatment of facial deformities pose a challenging surgical dilemma. METHODS: Over a 15-year period, microvascular free flap technique has been used successfully as a surgical tool to correct severe soft-tissue complications of the face resulting from silicone treatment of facial contour deformities. Surgical treatment guidelines, methods, and results for treating this difficult problem with free tissue transfer are presented. RESULTS: In 23 patients, 24 free tissue transfers (22 inframammary extended circumflex scapular free flaps and two superficial inferior epigastric free flaps) were performed. Flap survival was 100 percent. Both hematoma and skin necrosis were encountered in three of 24 cases (12.5 percent). Revisional surgery combined with aesthetic surgical procedures was required in 20 of 24 cases (83 percent). CONCLUSIONS: We recommend the following surgical treatment guidelines for this unique subset of patients: silicone excision with immediate microvascular free flap reconstructive procedure when the skin and soft tissue are mildly to moderately affected, or silicone excision with delayed reconstructive procedure when the skin and soft tissue are severely affected. Free tissue transfer is a useful surgical tool for salvaging severe facial skin and soft-tissue deformities caused by previous silicone treatment.