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Purpose@#Physician-modified endovascular stent grafts (PMEG) are a good treatment option for complex abdominal aortic aneurysms (AAAs), especially in high-risk patients not amenable to open repair, and when commercial fenestrated devices are not available. We report our single-center experience with PMEG for the treatment of complex AAAs. @*Methods@#We retrospectively reviewed patients who underwent PMEG repair for AAA from November 2016 to September 2020 at our institution. Demographic data, anatomic characteristics, perioperative and postoperative outcomes, major adverse events, and 30-day mortality were analyzed. @*Results@#We identified 12 patients who underwent PMEG for complex AAA. The mean age was 74 years and the mean maximal AAA diameter was 58.1 mm. Indications for treatment included 4 impending or contained ruptures, 2 mycotic aneurysms, and 6 symptomatic cases. The technical success rate was 91.7%. Aneurysm sac regression was observed in 7 patients (58.3%), including 2 cases of complete regression. There was 1 aneurysm-related mortality at 3 months due to mycotic aneurysm. Also, there was 1 postoperative complication case of transient renal failure requiring temporary dialysis. At 1 year, there was 1 branch occlusion from the initial failed cannulation case and 2 type 1A endoleaks, and there was 1 case of open explantation. @*Conclusion@#PMEG showed a low technical failure rate and acceptable midterm stent durability and sac stability, comparable to conventional endovascular aneurysm repair. Despite the small number of cases, there was a tendency for a high sac regression rate, although longer follow-up is needed.
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Background and Objectives@#Neck stab wounds should be managed properly as they can result in life-threatening complications and death. However, guns are prohibited in South Korea and many previous studies conducted in other countries are thus inapplicable. Also, most of the existing case reports deal mostly with profound neck injury and might lead to misunderstanding regarding the severity of injuries when considering neck stab wounds. This study analyzed the clinical characteristics of neck stab wounds according to the cause of trauma.Subjects and Method A total of 89 patients with neck stab wounds who visited the emergency room between January 2005 and June 2017 were enrolled. Medical records and radiological findings were reviewed retrospectively. The patients were divided into two groups according to the cause of trauma (suicide attempt or assault by another person). A comparative analysis of the two groups was conducted. @*Results@#The patients consisted of 41 cases of (46.1%) attempted suicides and 26 cases of (29.2%) psychiatric disorders. Of these, more than half had superficial wounds above the platysma, and multiple anatomical lacerations were found in 40 cases (45%). Psychiatric diagnoses were identified only in the attempted-suicide group (p<0.001), and injuries to the posterior neck triangle were observed only in the assault-by-another-person group (p=0.029). There were 11 cases (12.4%) of profound injury, but there was no significant difference between the two groups. One patient with injury by another person died due to the cutting of the common carotid artery. @*Conclusion@#Superficial injuries were more common while profound injuries were relatively uncommon in this study. However, physicians should pay attention to proper evaluation and management comprehensively in cases of neck stab wounds.
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BACKGROUND@#Sufficient blood supply through neo-vasculature is a major challenge in cell therapy and tissue engineering in order to support the growth, function, and viability of implanted cells. However, depending on the implant size and cell types, the natural process of angiogenesis may not provide enough blood supply for long term survival of the implants, requiring supplementary strategy to prevent local ischemia. Many researchers have reported the methodologies to form pre-vasculatures that mimic in vivo microvessels for implantation to promote angiogenesis. These approaches successfully showed significant enhancement in long-term survival and regenerative functions of implanted cells, yet there remains room for improvement. @*METHODS@#This paper suggests a proof-of-concept strategy to utilize novel scaffolds of dimpled/hollow electrospun fibers that enable the formation of highly mature pre-vasculatures with adequate dimensions and fast degrading in the tissue.RESULT: Higher surface roughness improved the maturity of endothelial cells mediated by increased cell-scaffold affinity. The degradation of scaffold material for functional restoration of the neo-vasculatures was also expedited by employing the hollow scaffold design based on co-axial electrospinning techniques. @*CONCLUSION@#This unique scaffold-based pre-vasculature can hold implanted cells and tissue constructs for a prolonged time while minimizing the cellular loss, manifesting as a gold standard design for transplantable scaffolds.
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BACKGROUND@#Sufficient blood supply through neo-vasculature is a major challenge in cell therapy and tissue engineering in order to support the growth, function, and viability of implanted cells. However, depending on the implant size and cell types, the natural process of angiogenesis may not provide enough blood supply for long term survival of the implants, requiring supplementary strategy to prevent local ischemia. Many researchers have reported the methodologies to form pre-vasculatures that mimic in vivo microvessels for implantation to promote angiogenesis. These approaches successfully showed significant enhancement in long-term survival and regenerative functions of implanted cells, yet there remains room for improvement. @*METHODS@#This paper suggests a proof-of-concept strategy to utilize novel scaffolds of dimpled/hollow electrospun fibers that enable the formation of highly mature pre-vasculatures with adequate dimensions and fast degrading in the tissue.RESULT: Higher surface roughness improved the maturity of endothelial cells mediated by increased cell-scaffold affinity. The degradation of scaffold material for functional restoration of the neo-vasculatures was also expedited by employing the hollow scaffold design based on co-axial electrospinning techniques. @*CONCLUSION@#This unique scaffold-based pre-vasculature can hold implanted cells and tissue constructs for a prolonged time while minimizing the cellular loss, manifesting as a gold standard design for transplantable scaffolds.
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Purpose@#Serous cystic neoplasm (SCN) of the pancreas is considered benign in most cases. However, some SCN patients undergo surgical resection because lesions could not be differentiated preoperatively. This study evaluated causes of resection for SCN, investigated clinical and radiological features of surgically resected SCNs, and compared characteristics of SCNs diagnosed accurately and those misdiagnosed. @*Methods@#One hundred patients, who underwent surgery for pancreatic cystic tumors with pathological confirmation of SCN between 2000 and 2014 were retrospectively analyzed. @*Results@#The mean patient age was 52.9 years, 67 (67%) were female, and most lesions (72%) were located in the pancreatic body or tail. Fifty-one (51%) pathologically confirmed SCNs were preoperatively diagnosed as non-SCNs. Patients underwent surgery due to uncertain diagnosis (58%) or symptomatology (18%). According to radiological examination, most lesions were macrocystic (85%), exhibited septation (58%), or were enhancing lesions (48%). Compared with preoperatively diagnosed non-SCNs, accurately diagnosed SCNs exhibited septation (75.5% vs. 41.2%, P = 0.001) and central scar (36.7% vs. 11.8%, P = 0.003) more frequently in radiological examinations. In terms of macrocystic tumors (n = 85), most parameters did not differentiate preoperative diagnoses, although lesions accurately diagnosed as SCN exhibited septation more frequently than those preoperatively misdiagnosed as mucinous cystic neoplasm or intraductal papillary mucinous neoplasm (70.7% vs. 38.9% vs. 33.3%, respectively, P = 0.009). @*Conclusion@#It is difficult to accurately distinguish macrocystic SCNs from other cystic tumors using conventional radiological methods. For more accurate diagnosis, new biomarkers and/or other diagnostic modalities are needed and warrant further investigation.
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Purpose@#Serous cystic neoplasm (SCN) of the pancreas is considered benign in most cases. However, some SCN patients undergo surgical resection because lesions could not be differentiated preoperatively. This study evaluated causes of resection for SCN, investigated clinical and radiological features of surgically resected SCNs, and compared characteristics of SCNs diagnosed accurately and those misdiagnosed. @*Methods@#One hundred patients, who underwent surgery for pancreatic cystic tumors with pathological confirmation of SCN between 2000 and 2014 were retrospectively analyzed. @*Results@#The mean patient age was 52.9 years, 67 (67%) were female, and most lesions (72%) were located in the pancreatic body or tail. Fifty-one (51%) pathologically confirmed SCNs were preoperatively diagnosed as non-SCNs. Patients underwent surgery due to uncertain diagnosis (58%) or symptomatology (18%). According to radiological examination, most lesions were macrocystic (85%), exhibited septation (58%), or were enhancing lesions (48%). Compared with preoperatively diagnosed non-SCNs, accurately diagnosed SCNs exhibited septation (75.5% vs. 41.2%, P = 0.001) and central scar (36.7% vs. 11.8%, P = 0.003) more frequently in radiological examinations. In terms of macrocystic tumors (n = 85), most parameters did not differentiate preoperative diagnoses, although lesions accurately diagnosed as SCN exhibited septation more frequently than those preoperatively misdiagnosed as mucinous cystic neoplasm or intraductal papillary mucinous neoplasm (70.7% vs. 38.9% vs. 33.3%, respectively, P = 0.009). @*Conclusion@#It is difficult to accurately distinguish macrocystic SCNs from other cystic tumors using conventional radiological methods. For more accurate diagnosis, new biomarkers and/or other diagnostic modalities are needed and warrant further investigation.
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Spinal cord ischemia after open repair of abdominal aortic aneurysm (AAA) is an unpredictable and devastating complication. We present a case report of a patient who developed paraplegia 6 hours after open repair of suprarenal AAA. A 74-yearold man presented with asymptomatic 5.5-cm suprarenal AAA, for which he underwent open repair under general anesthesia. The paraplegia was identified 6 hours after the operation. Postoperative magnetic resonance imaging showed T2 signal hyperintensity and swelling of the spinal cord, which were consistent findings with subacute spinal cord infarction. Although intravenous steroid was administered and lumbar cerebral spinal fluid drainage was instituted, his neurological outcome did not improve. He was discharged after vigorous rehabilitation but still has paraplegia and requires wheelchair for ambulation.
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Spinal cord ischemia after open repair of abdominal aortic aneurysm (AAA) is an unpredictable and devastating complication. We present a case report of a patient who developed paraplegia 6 hours after open repair of suprarenal AAA. A 74-yearold man presented with asymptomatic 5.5-cm suprarenal AAA, for which he underwent open repair under general anesthesia. The paraplegia was identified 6 hours after the operation. Postoperative magnetic resonance imaging showed T2 signal hyperintensity and swelling of the spinal cord, which were consistent findings with subacute spinal cord infarction. Although intravenous steroid was administered and lumbar cerebral spinal fluid drainage was instituted, his neurological outcome did not improve. He was discharged after vigorous rehabilitation but still has paraplegia and requires wheelchair for ambulation.
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BACKGROUND AND OBJECTIVES@#We investigated whether the intratympanic steroid injections might be an effective initial treatment for sudden sensorineural hearing loss (SSNHL) in patients with diabetes mellitus (DM).SUBJECTS AND METHOD: We assessed a total of 167 patients with DM and SSNHL who visited a tertiary referral otolaryngology department between January 2010 and April 2018. Forty-two patients with DM and SSNHL received intratympanic steroid injections; 48 patients with DM and SSNHL received systemic steroid treatment; and 77 patients with DM and SSNHL received a combination of systemic and intratympanic treatment. Initial and post treatment hearing levels and fasting blood sugar (FBS) were assessed, and correlations between hearing gain and the duration of DM, HbA1c, FBS were investigated.@*RESULTS@#After steroid treatment, hearing levels were 38.87ñ25.35 dB in the intratympanic injection group, 41.09ñ28.49 dB in the systemic steroid treatment group, and 47.81ñ27.12 dB in the combined treatment group. Final hearing levels and hearing gain in the three groups did not differ significantly. FBS after treatment in the systemic steroid treatment and combined steroid treatment group worsened relative to the intratympanic injection group (202.00ñ9.40 mg/dL to 326.63ñ7.85 mg/dL). FBS, duration of DM, and HbA1c levels did not affect the hearing gain in patients with DM and SSNHL.@*CONCLUSION@#Intratympanic steroid injections are comparable to the systemic steroid treatment modality for SSNHL in patients with DM. Thus, intratympanic steroid injections may serve as an effective initial treatment modality for SSNHL in patients with DM.
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BACKGROUND AND OBJECTIVES: We investigated whether the intratympanic steroid injections might be an effective initial treatment for sudden sensorineural hearing loss (SSNHL) in patients with diabetes mellitus (DM). SUBJECTS AND METHOD: We assessed a total of 167 patients with DM and SSNHL who visited a tertiary referral otolaryngology department between January 2010 and April 2018. Forty-two patients with DM and SSNHL received intratympanic steroid injections; 48 patients with DM and SSNHL received systemic steroid treatment; and 77 patients with DM and SSNHL received a combination of systemic and intratympanic treatment. Initial and post treatment hearing levels and fasting blood sugar (FBS) were assessed, and correlations between hearing gain and the duration of DM, HbA1c, FBS were investigated. RESULTS: After steroid treatment, hearing levels were 38.87±25.35 dB in the intratympanic injection group, 41.09±28.49 dB in the systemic steroid treatment group, and 47.81±27.12 dB in the combined treatment group. Final hearing levels and hearing gain in the three groups did not differ significantly. FBS after treatment in the systemic steroid treatment and combined steroid treatment group worsened relative to the intratympanic injection group (202.00±9.40 mg/dL to 326.63±7.85 mg/dL). FBS, duration of DM, and HbA1c levels did not affect the hearing gain in patients with DM and SSNHL. CONCLUSION: Intratympanic steroid injections are comparable to the systemic steroid treatment modality for SSNHL in patients with DM. Thus, intratympanic steroid injections may serve as an effective initial treatment modality for SSNHL in patients with DM.
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Humanos , Glucemia , Diabetes Mellitus , Ayuno , Audición , Pérdida Auditiva Sensorineural , Inyección Intratimpánica , Métodos , Otolaringología , Derivación y Consulta , EsteroidesRESUMEN
Vocal fold scarring is an intractable phonosurgical condition. The number of patients with vocal fold scars is increasing with the aging of society and with the increasing application of laryngeal microsurgery. Many methods are available to treat these, including voice therapy, stem cells, regenerative scaffolds, and growth factors. However, no standard treatment strategy has yet been established, and novel techniques are required. Basic fibroblast growth factor has been shown to be effective for the treatment of mild chronic vocal fold scarring. The combined use of basic fibroblast growth factor and regenerative scaffolds is currently under investigation. Here, we report a female patient in whom vocal fold scarring developed after two laryngeal microsurgeries. We performed laryngeal microsurgery to remove the scar tissue and used basic fibroblast growth factor and a collagen scaffold to promote healing. The patient's voice quality was greatly increased, and she was content with her voice after 2 years of follow-up. This is the first report of this methodology in Korea and is presented along with a review of the literature.
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OBJECTIVES: The traditional canal wall down mastoidectomy (CWDM) procedure commonly has potential problems of altering the anatomy and physiology of the middle ear and mastoid. This study evaluated outcomes in patients who underwent modified canal wall down mastoidectomy (mCWDM) and mastoid obliteration using autologous materials. METHODS: Our study included 76 patients with chronic otitis media, cholesteatoma, and adhesive otitis who underwent mCWDM and mastoid obliteration using autologous materials between 2010 and 2015. Postoperative hearing air-bone gap and complications were evaluated. RESULTS: During the average follow-up of 64 months (range, 20 to 89 months), there was no recurrent or residual cholesteatoma or chronic otitis media. No patient had a cavity problem and anatomic integrity of the posterior canal wall was obtained. There was a significant improvement in hearing with respect to the postoperative air-bone gap (P<0.05). A retroauricular skin depression was a common complication of this technique. CONCLUSION: The present study suggests that our technique can prevent various complications of the classical CWDM technique using autologous tissues for mastoid cavity obliteration. It is also an appropriate method to obtain adequate volume for safe obliteration.
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Humanos , Adhesivos , Cartílago , Colesteatoma , Depresión , Oído Medio , Estudios de Seguimiento , Audición , Apófisis Mastoides , Métodos , Otitis , Otitis Media , Fisiología , PielRESUMEN
OBJECTIVES: Vertigo combined with sudden sensorineural hearing loss (SSNHL) is known as a poor prognostic factor. We investigated clinical findings and vestibular function tests in patients of SSNHL with vertigo to find the prognostic factors. METHODS: We retrospectively evaluated data on the patients diagnosed with SSNHL with vertigo at Bucheon Soonchunhyang University Hospital from March 2009 to February 2018. We reviewed medical records and the results of vestibular function tests and audiometry. RESULTS: Of the 68 patients, 30 (44.1%) showed profound hearing loss and 53 (77.9%) showed poor recovery. Age and the degree of initial hearing loss showed negative prognostic factor in hearing recovery. Abnormal results of cervical vestibular evoked myogenic potentials (cVEMP) also showed significantly differences between good and poor recovery groups. CONCLUSIONS: In this study, most of the patients of SSNHL with vertigo showed poor recovery. Age, degree of initial hearing loss, and the abnormal result of the cVEMP have a negative effect on the prognosis of hearing recovery.
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Humanos , Audiometría , Audición , Pérdida Auditiva , Pérdida Auditiva Sensorineural , Registros Médicos , Pronóstico , Estudios Retrospectivos , Vértigo , Potenciales Vestibulares Miogénicos Evocados , Pruebas de Función VestibularRESUMEN
Tracheobronchopathia osteochondroplastica (TO) is a rare idiopathic tracheobronchial abnormality characterized by diffuse cartilaginous and osseous nodules protruding into the airway lumen of the trachea and bronchus. TO is easy to misdiagnose because of nonspecific symptoms and chest CT scan with pathologic biopsy is necessary for definitive diagnosis. We report two cases of patient with TO who underwent laryngomicroscopic biopsy and tracheostomy with literature review.
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Humanos , Biopsia , Bronquios , Diagnóstico , Tomografía Computarizada por Rayos X , Tráquea , TraqueostomíaRESUMEN
Catathrenia is a rare sleep disease characterized by monotonous groaning sounds that appear to be related with prolonged expiration, commonly experienced during rapid eye movement (REM) sleep. Catathrenia is also known as nocturnal groaning or sleep-related groaning and is currently categorized as a sleep-related breathing disorder. We present a rare case of a 19-year-old male with nocturnal groaning during non-REM sleep. We suggest that if catathrenia is suspected, polysomnography should be utilized to differentiate it from various sleep disorders such as snoring, central sleep apnea, sleep talking, parasomnia, and sleep-related movement disorders.
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Humanos , Masculino , Adulto Joven , Trastornos del Movimiento , Parasomnias , Polisomnografía , Respiración , Apnea Central del Sueño , Trastornos del Sueño-Vigilia , Sueño REM , Trastornos de la Transición Sueño-Vigilia , RonquidoRESUMEN
PURPOSE: Thyroid cancer is a rare disease in pediatric population, but its incidence rate is increasing. The aim of this report is to present a single institution experience of pediatric thyroid cancer and to identify clinical features, predisposing factors, and postoperative course of pediatric thyroid cancer. METHODS: We retrospectively reviewed 35 pediatric patients who underwent operation due to thyroid cancer at Seoul National University Children's Hospital between May 1997 and January 2017. The median follow-up period was 70 months (range, 5–238 months). RESULTS: The mean age at operation was 12.0±5.91 years and 27 patients were female. The underlying conditions in patients included history of chemoradiotherapy for previous other malignancies (n=4), hypothyroidism (n=3), history of chemotherapy (n=2), family history of thyroid cancer (n=1) and history of radiation therapy (n=1). The initial symptoms were palpable neck mass (n=21) and incidental findings (n=11). Total thyroidectomy (n=30) or unilateral lobectomy (n=5) were performed. There were 15 postoperative complications including transient hypocalcemia in 14 patients and Horner's syndrome in 1 patient. The most common pathologic cell type was papillary thyroid cancer (n=29). Extrathyroid extension and lymph node invasion were found in 25 patients and 27 patients, respectively. Thirteen patients showed multifocality. During follow-up period, 5 patients underwent additional operation because of tumor recurrence in lymph nodes. Lung metastasis was detected in 3 patients at the time of diagnosis and in 3 patients during follow-up period. The mortality rate was zero and mean disease-free survival was 83.7±47.9 months. CONCLUSION: Pediatric thyroid cancer has lower mortality rate and recurrence rate as seen in this study despite the advanced stage at diagnosis. A thorough follow-up of patients with an underlying condition such as history of chemoradiotherapy and understanding new pediatric guideline can be helpful to maximize patients' survival and prognosis.
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Femenino , Humanos , Causalidad , Quimioradioterapia , Diagnóstico , Supervivencia sin Enfermedad , Quimioterapia , Estudios de Seguimiento , Síndrome de Horner , Hipocalcemia , Hipotiroidismo , Incidencia , Hallazgos Incidentales , Pulmón , Ganglios Linfáticos , Mortalidad , Cuello , Metástasis de la Neoplasia , Pediatría , Complicaciones Posoperatorias , Pronóstico , Enfermedades Raras , Recurrencia , Estudios Retrospectivos , Seúl , Glándula Tiroides , Neoplasias de la Tiroides , TiroidectomíaRESUMEN
BACKGROUND AND OBJECTIVES: Positional therapy is a therapeutic method for obstructive sleep apnea (OSA). However, little is known about the effectiveness of positional OSA treatment based on meta-analysis. Therefore, we undertook a review and meta-analysis of studies to assess the effect of positional therapy on OSA. SUBJECTS AND METHOD: We searched PubMed (Medline), OVID Medline, EMBASE, Cochrane Library, SCOPUS, KoreaMed, MedRIC, and KSI KISS using the key words “obstructive sleep apnea” and “positional therapy”. To estimate the effect of positional OSA therapy, we analyzed the ratio of means (ROM) for pre- and post-treatment polysomnographic data including apnea-hypopnea index (AHI), lowest oxygen saturation, arousal index, and sleep efficiency. RESULTS: Finally, twenty two studies from 21 papers were included in the meta-analysis. Positional therapy significantly decreased AHI by 54.1% [ROM, 0.459; 95% confidence interval (CI), 0.394 to 0.534] and increased lowest oxygen saturation by 3.3% (ROM, 1.033; 95% CI, 1.020 to 1.046). However, positional therapy did not significantly change arousal index (ROM, 0.846; 95% CI, 0.662 to 1.081) or sleep efficiency (ROM, 1.008; 95% CI, 0.990 to 1.027). CONCLUSION: Positional therapy significantly improves respiratory parameters including AHI and lowest oxygen saturation in patients with OSA.
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Humanos , Nivel de Alerta , Métodos , Oxígeno , Polisomnografía , Apnea Obstructiva del SueñoRESUMEN
OBJECTIVES: To evaluate the blood and urinary cadmium concentration levels of around abandoned metal mines in comparison with a control group. METHODS: Blood and urinary cadmium concentration levels were analyzed through investigations of the dietary habits and dietary water of subjects living near abandoned metal mines (exposure group) (n=190) in comparison with those living in designated control areas (control group) (n=256). RESULTS: The blood cadmium (1.93 microgram/l) and urinary cadmium (2.41 microgram/g cr) concentrations of the exposure group were significantly higher than those of the control group (blood cadmium: 1.19 microgram/l, urinary cadmium: 1.94 microgram/g cr). Both concentrations were significantly higher in vegetarians in both groups. CONCLUSIONS: The exposure group had higher blood and urinary cadmium concentrations than the control group. We attributed the elevated blood and urine cadmium levels in the abandoned mine residents to the influence of the abandoned mine sites.
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Cadmio , Conducta Alimentaria , AguaRESUMEN
Lumbo-sacral junction is a transition zone between the mobile lumbar spine and immobile pelvis. Lumbosacral junction has been considered to be the most troublesome portion of the spine to be fused because of the difference in anatomical and biomechanical factors between spine and pelvis. A metastatic sacral tumor in a 57-year-old man was resected, followed by unilateral lumbo-iliac fixation across lumbosacral junction using modified Galveston technique. Rigid fixation was successfully achieved. Detailed anatomy and surgical techniques are presented.
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Humanos , Persona de Mediana Edad , Artrodesis , Pelvis , Columna VertebralRESUMEN
OBJECTIVE: Neuroimaging data are of paramount importance in making correct diagnosis. We herein evaluate the clinical usefulness of image transfer using cellular phones to facilitate neurological diagnosis and decision-making. METHODS: Selected images from CT, MRI scans, and plain films obtained from 50 neurosurgical patients were transferred by cellular phones. A cellular phone with a built-in 1,300,000-pixel digital camera was used to capture and send the images. A cellular phone with a 262,000 color thin-film transistor liquid crystal display was used to receive the images. Communication between both cellular phones was operated by the same wireless protocol and the same wireless internet service. We compared the concordance of diagnoses and treatment plans between a house staff who could review full-scale original films and a consultant who could only review transferred images. These finding were later analyzed by a third observer. RESULTS: The mean time of complete transfer was 2~3 minutes. The quality of all images received was good enough to make precise diagnosis and to select treatment options. Transferred images were helpful in making correct diagnosis and decision making in 49/50 (98%) cases. Discordant result was caused in one patient by improper selection of images by the house staff. CONCLUSION: The cellular phone system was useful for image transfer and delivery of patient's information, leading to earlier diagnosis and initiation of treatment. This usefulness was due to sufficient resolution of the built-in camera and the TFT-LCD, the user-friendly features of the devices, and their low cost.