Deep-learning-based attenuation correction in dynamic [15O]H2O studies using PET/MRI in healthy volunteers.

Quantitative [15O]H2O positron emission tomography (PET) is the accepted reference method for regional cerebral blood flow (rCBF) quantification. To perform reliable quantitative [15O]H2O-PET studies in PET/MRI scanners, MRI-based attenuation-correction (MRAC) is required. Our aim was to compare two MRAC methods (RESOLUTE and DeepUTE) based on ultrashort echo-time with computed tomography-based reference standard AC (CTAC) in dynamic and static [15O]H2O-PET. We compared rCBF from quantitative perfusion maps and activity concentration distribution from static images between AC methods in 25 resting [15O]H2O-PET scans from 14 healthy men at whole-brain, regions of interest and voxel-wise levels. Average whole-brain CBF was 39.9 ± 6.0, 39.0 ± 5.8 and 40.0 ± 5.6 ml/100 g/min for CTAC, RESOLUTE and DeepUTE corrected studies respectively. RESOLUTE underestimated whole-brain CBF by 2.1 ± 1.50% and rCBF in all regions of interest (range -2.4%- -1%) compared to CTAC. DeepUTE showed significant rCBF overestimation only in the occipital lobe (0.6 ± 1.1%). Both MRAC methods showed excellent correlation on rCBF and activity concentration with CTAC, with slopes of linear regression lines between 0.97 and 1.01 and R2 over 0.99. In conclusion, RESOLUTE and DeepUTE provide AC information comparable to CTAC in dynamic [15O]H2O-PET but RESOLUTE is associated with a small but systematic underestimation.

Comparison of simultaneous arterial spin labeling MRI and 15O-H2O PET measurements of regional cerebral blood flow in rest and altered perfusion states.

Arterial spin labelling (ASL) is a non-invasive magnetic resonance imaging (MRI) technique that may provide fully quantitative regional cerebral blood flow (rCBF) images. However, before its application in clinical routine, ASL needs to be validated against the clinical gold standard, 15O-H2O positron emission tomography (PET). We aimed to compare the two techniques by performing simultaneous quantitative ASL-MRI and 15O-H2O-PET examinations in a hybrid PET/MRI scanner. Duplicate rCBF measurements were performed in healthy young subjects (n = 14) in rest, during hyperventilation, and after acetazolamide (post-ACZ), yielding 63 combined PET/MRI datasets in total. Average global CBF by ASL-MRI and 15O-H2O-PET was not significantly different in any state (40.0 ± 6.5 and 40.6 ± 4.1 mL/100 g/min, respectively in rest, 24.5 ± 5.1 and 23.4 ± 4.8 mL/100 g/min, respectively, during hyperventilation, and 59.1 ± 10.4 and 64.7 ± 10.0 mL/100 g/min, respectively, post-ACZ). Overall, strong correlation between the two methods was found across all states (slope = 1.01, R2 = 0.82), while the correlations within individual states and of reactivity measures were weaker, in particular in rest (R2 = 0.05, p = 0.03). Regional distribution was similar, although ASL yielded higher perfusion and absolute reactivity in highly vascularized areas. In conclusion, ASL-MRI and 15O-H2O-PET measurements of rCBF are highly correlated across different perfusion states, but with variable correlation within and between hemodynamic states, and systematic differences in regional distribution.

Usefulness of HMPAO-SPECT in the diagnosis of nonconvulsive status epilepticus.

BACKGROUND: The diagnosis of nonconvulsive status epilepticus (NCSE) can pose a challenge. Electroencephalogram (EEG) patterns can be difficult to interpret, and the absence of an EEG correlate does not rule out the diagnosis of NCSE. In this setting, neuroimaging tools to help in the diagnosis are crucial. Our aim was to evaluate the role of 99mTc-hexamethyl propyleneamine oxime (HMPAO) single photon emission computed tomography (SPECT) and quantitative HMPAO-SPECT (QtSPECT) in patients with clinical suspicion of NCSE, and to evaluate their value in the final diagnosis of NCSE. METHODS: We recruited consecutive patients admitted in our center with suspicion of NCSE, and selected those who underwent an HMPAO-SPECT. All patients were admitted to the neurology ward and underwent an EEG. We divided the patients into those who were finally with diagnosed NCSE (NCSE-p) and those who were not (non-NCSE) according to the Salzburg Diagnostic EEG criteria. Sensitivity and specificity of the diagnostic tools were calculated. The SPECTs were acquired in a Skylight SPECT (Philips Healthcare, Amsterdam). The injections were done during the clinical episode suspected of being an NCSE. The HMPAO-SPECT was analyzed by two experts and was also quantified. All data were normalized to the SPM SPECT template. We used an external healthy normal database to obtain a Z-score map for each individual versus the normal database. The Z-score maximum (Zmax) was extracted from each region of the AAL atlas as was the percentage of voxels with a Z-score higher than 2.5 (N(%)). A logistic regression combining the Zmax, N(%), and the effect of patient age was fitted to predict the final NCSE diagnosis. A receiver operator characteristic (ROC) curve and the area under the curve (AUC) were obtained to evaluate the classification performance. RESULTS: We included 55 patients, 21 of them women (38.9%), with a median age of 62.1 years old (range 25-84). Thirty-six patients were with diagnosed NCSE (62.9%). Initial EEG had a sensitivity of 61.1% and a specificity of 89%. Most of the patients were critically ill with diagnostic difficulties, and it could be one of the main reasons to find low sensitivity of the Salzburg diagnostic EEG criteria. The Zmax and N(%) were significantly higher in NCSE-p than in non-NCSE (p = 0.005 and p < 0.001, respectively). The HMPAO-SPECT qualitative analysis had a sensitivity of 80.5% and specificity of 89.5% while QtSPECT had a sensitivity of 82% and specificity of 81%. CONCLUSION: Both 99mTc-HMPAO-SPECT and QtSPECT can be useful in the diagnosis of NCSE. This article is part of the Special Issue "Proceedings of the 7th London-Innsbruck Colloquium on Status Epilepticus and Acute Seizures".

Nerve-sparing versus non-nerve-sparing radical hysterectomy: surgical and long-term oncological outcomes.

OBJECTIVES: There are controversies regarding the long-term oncological safety of preservation of pelvic innervation during radical hysterectomy (RH). This study aimed to analyze the feasibility and safety of nerve-sparing radical hysterectomy (NSRH) for cervical cancer compared with non-NSRH following 17 years of experience in a tertiary cancer referral center. MATERIALS AND METHODS: Between May 1999 and June 2016, all patients who underwent RH for cervical cancer were followed-up prospectively. Comparison analyses regarding surgical outcomes, complications, overall survival (OS), disease-free survival (DFS), and cancer-specific survival (CSS) were performed between patients treated with NSRH and non-NSRH. RESULTS: A total of 188 patients were included (113 non-NSRH and 75 NSRH). The median follow-up was 112 months. Estimated blood loss and hospital stay were all significantly lower in the NSRH group. Overall intraoperative complication rate (p = 0.02) and need for transfusion (p = 0.016) were lower in the NSRH group. There were no differences in the median operation time, OS, DFS, CSS, or recurrence rates between the NSRH and non-NSRH group. CONCLUSIONS: Our study provides a wide perspective on the developments of nerve-sparing procedures for the management of women with early-stage cervical cancer. Our results suggest that NSRH is a feasible and safe procedure, with reduced morbidity outcomes.

Phase contrast mapping MRI measurements of global cerebral blood flow across different perfusion states - A direct comparison with 15O-H2O positron emission tomography using a hybrid PET/MR system.

Phase-contrast mapping (PCM) magnetic resonance imaging (MRI) provides easy-access non-invasive quantification of global cerebral blood flow (gCBF) but its accuracy in altered perfusion states is not established. We aimed to compare paired PCM MRI and 15O-H2O positron emission tomography (PET) measurements of gCBF in different perfusion states in a single scanning session. Duplicate combined gCBF PCM-MRI and 15O-H2O PET measurements were performed in the resting condition, during hyperventilation and after acetazolamide administration (post-ACZ) using a 3T hybrid PET/MR system. A total of 62 paired gCBF measurements were acquired in 14 healthy young male volunteers. Average gCBF in resting state measured by PCM-MRI and 15O-H2O PET were 58.5 ± 10.7 and 38.6 ± 5.7 mL/100 g/min, respectively, during hyperventilation 33 ± 8.6 and 24.7 ± 5.8 mL/100 g/min, respectively, and post-ACZ 89.6 ± 27.1 and 57.3 ± 9.6 mL/100 g/min, respectively. On average, gCBF measured by PCM-MRI was 49% higher compared to 15O-H2O PET. A strong correlation between the two methods across all states was observed (R2 = 0.72, p < 0.001). Bland-Altman analysis suggested a perfusion dependent relative bias resulting in higher relative difference at higher CBF values. In conclusion, measurements of gCBF by PCM-MRI in healthy volunteers show a strong correlation with 15O-H2O PET, but are associated with a large and non-linear perfusion-dependent difference.

Laparoscopic Isthmocele Repair with Hysteroscopic Assistance.

OBJECTIVE: To demonstrate our experience with hysteroscopic assistance in the laparoscopic repair of an isthmocele. DESIGN: Surgical video article (Canadian Task Force classification III). SETTING: University hospital. INTERVENTION: A 42-year-old woman with a history of previous caesarean section presented as an emergency with a large, seriously infected isthmocele. Once the infection was cured with antibiotics, sonography revealed a 23 × 14-mm isthmocele with 1.4-mm residual myometrium thickness. She reported postmenstrual spotting and dysmenorrhea of several years duration, as well as previous dyspareunia that had worsened after her cesarean section. Given her symptomatic isthmocele with thin residual myometrium and desire for childbearing, laparoscopic repair was offered. First, the bladder was dissected to expose the isthmus. Uterine arteries were dissected. Hysteroscopic guidance and transillumination revealed the edges of the defect. The isthmocele and fibrotic tissue were excised with cold scissors, minimizing cauterization. A hysterometer was placed in the uterine cavity to respect the cervical canal and posterior uterine wall, and the myometrium was then closed in 2 layers. The total surgical time was 120 minutes. The postoperative period was uneventful. At 2 months after surgery, sonography confirmed restoration, with a myometrium thickness of 8.3 mm. The patient was asymptomatic, except for dyspareunia. At 6 months after surgery, hysteroscopic examination was normal. We recommended that the patient avoid attempting pregnancy for 9 months. CONCLUSION: Hysteroscopic simultaneous assistance during laparoscopic isthmocele repair can be of great help in identifying the edges of the defect, especially in large cavities and in first cases, in which edges might not be clear otherwise. Resecting all of the fibrotic tissue while respecting healthy myometrium is essential. Excessive cauterization and ischemic suturing could prevent proper healing of the myometrium.

Prospective Randomized Trial Comparing Transperitoneal Versus Extraperitoneal Laparoscopic Aortic Lymphadenectomy for Surgical Staging of Endometrial and Ovarian Cancer: The STELLA Trial.

BACKGROUND: There is an ongoing debate on which approach, transperitoneal or extraperitoneal, is superior for the performance of laparoscopic aortic lymphadenectomy (LPA-LND) for the surgical staging of gynecologic cancer. A prospective randomized trial (STELLA trial) was designed to compare the perioperative outcomes and node retrieval of extraperitoneal versus transperitoneal aortic lymphadenectomy by laparoscopy or robot-assisted laparoscopy. METHODS: Patients with endometrial or ovarian carcinoma requiring aortic lymphadenectomy for surgical staging were randomized to an extraperitoneal or transperitoneal approach by laparoscopy or robot-assisted laparoscopy between June 2012 and July 2014. RESULTS: A total of 60 patients were entered into the study, 48 with endometrial cancer (80 %) and 12 with ovarian cancer (20 %). Thirty-one patients (51.6 %) were randomly assigned to the extraperitoneal group and 29 to the transperitoneal group (48.3 %). The means LPA-LND operating time was 90 min in both group (p = 0.343). The mean (range) blood loss was 105 (10-400) mL for extraperitoneal versus 100 (5-1000) mL for transperitoneal group (p = 0.541). There were no differences in the number of collected lymph nodes between the two groups [median (range) for extraperitoneal 12 (4-41) vs. 13 (4-29) for transperitoneal (p = 0.719)]. CONCLUSIONS: The extraperitoneal and transperitoneal approaches for laparoscopic and robotic aortic lymphadenectomy provide similar perioperative outcomes and nodal yields. TRIAL REGISTRATION: The STELLA trial is registered at the US National Institutes of Health (ClinicalTrials.gov) #NCT01810874.

Refractory status epilepticus due to SMART syndrome.

INTRODUCTION: Stroke-like migraine attacks after radiation therapy (SMART) is a late-onset complication of brain irradiation of unknown physiopathology. Our aim was to present three patients with SMART syndrome who had clinical and neuroimage studies suggestive of status epilepticus. PATIENTS: Patient 1. A 69-year-old woman, who was treated with radiation therapy 14 years before her first admission to the Neurology Department, presented with several episodes of headache, speech disturbances, and weakness of left limbs with altered awareness. Patient 2. A 49-year-old man, who was treated with whole brain radiation 20 years before the onset of symptoms, developed some episodes consisting of headache and numbness of the right side of face and right arm; the latest episodes were accompanied by visual disturbances followed by generalized tonic-clonic seizures. Patient 3. A 40-year-old man, who received cranial irradiation 20 years before, suffered three episodes of behavioral disturbance, aphasia, headache, and visual aura followed by left homonymous hemianopia. RESULTS: All three patients suffered seizures mostly with visual aura. Electroencephalography showed interictal epileptiform discharges or focal slowing. Brain magnetic resonance image (MRI), positron emission tomography (PET), or ictal-single-photon emission computed tomography (SPECT) showed focal cortical hyperperfusion. Focal diffusion restriction and focal gadolinium-enhancement were observed on MRI. All patients were treated with antiepileptic drugs, being effective in one of them. One patient needed anesthesic coma, and the other patient responded to therapy with corticosteroids. CONCLUSIONS: Taking into account clinical evolution and ictal neuroimaging studies, status epilepticus could explain the origin of these episodes in SMART syndrome. Although most patients have reversible symptoms, in some cases, aggressive treatment to avoid sequelae is needed. This article is part of a Special Issue entitled "Status Epilepticus".

Nerve sparing technique in robotic-assisted radical hysterectomy: results.

BACKGROUND: This work assessed the role of robotic-assisted lapararoscopic radical hysterectomy in the treatment of early invasive cervical cancer with special regard to nerve sparing technique. METHODS: Between October 2009 and June 2011, a total of 14 non-consecutive patients underwent early cervical cancer surgery at the authors' institution. Patients with FIGO stage IA2 or IB1 with a tumor size less than or equal to 2 cm underwent radical hysterectomy type B1 and patients with FIGO stage IB1 with a tumor mass bigger than 2 cm underwent a radical hysterectomy using a C1 type technique. RESULTS: Three type B1 and 11 type C1 radical hysterectomies with robotic-assisted laparoscopy were performed using Da Vinci®. The median operation time was 260 min (range 150-300 min). The median follow-up after surgery was 13.7 months (range 1-23 months). During this time, three patients reported anorectal dysfunction while none reported sexual or bladder dysfunction. All patients remain without evidence of disease except one with high risk factors for recurrence. They all are alive. CONCLUSIONS: Laparoscopic robotic-assisted radical hysterectomy with nerve sparing technique is an attractive surgical approach for early invasive cervical cancer. Robotic technology allows a stereoscopic visualization of blood vessels and autonomic nerve supplies (sympathetic and parasympathetic branches) to the bladder and rectum making nerve sparing a safe and feasible procedure.

Dependencia para la realización de actividades de la vida diaria en las personas mayores de Cataluña / Dependency for activities of daily living in the elderly in Catalonia, Spain

El objetivo de este artículo es estimar la prevalencia de la dependencia para las actividades de la vida diaria (AVD), características sociodemográficas, de salud y de utilización de servicios en la población ≥ 65 años, diferenciando la población que recibe ayuda y la que no. Estudio transversal (Encuesta de Salud de Cataluña [ESCA] 2006) en el que se analizan 17 AVD. Se estiman las diferencias de proporciones con un intervalo de confianza del 95% para caracterizar los grupos de análisis. Una regresión logística describe las variables explicativas con relación a tener o no ayuda. La prevalencia de dependencia para las AVD es del 26,6% en hombres y el 48,2% en mujeres, de los cuales el 79,6% recibe ayuda. En la prevalencia se observa un gradiente por nivel socioeconómico que no se observa con relación a recibir ayuda o no. Es necesario profundizar en el conocimiento del fenómeno y su evolución, para lo cual la ESCA es un instrumento esencial (AU)

The aim of this article is to estimate the disabilty prevalence for the activities of daily living (ADL), the socioeconomic and demographic characteristics and the use of health services, distinguishing between the population receiving assistance for ADL and not. Cross-sectional study (Encuesta de Salud de Cataluña [ESCA] 2006). We have analyzed 17 ADL. Differences among proportions are estimated with a 95% confidence interval to characterize the analysis groups. Logistic regression describes the explanatory variables about getting help or not. Disabilty prevalence for the ADL: 26.6% men and 48.2% in women. Of these, 79.6% is getting help. There is a socioeconomic gradient in prevalence, not being observed in relation to assistance or not. We must deepen our understanding of the phenomenon and its evolution to which the ESCA is an essential tool (AU)

[Dependency for activities of daily living in the elderly in Catalonia, Spain]. / Dependencia para la realización de actividades de la vida diaria en las personas mayores de Cataluña.

The aim of this article is to estimate the disabilty prevalence for the activities of daily living (ADL), the socioeconomic and demographic characteristics and the use of health services, distinguishing between the population receiving assistance for ADL and not. Cross-sectional study (Encuesta de Salud de Cataluña [ESCA] 2006). We have analyzed 17 ADL. Differences among proportions are estimated with a 95% confidence interval to characterize the analysis groups. Logistic regression describes the explanatory variables about getting help or not. Disabilty prevalence for the ADL: 26.6% men and 48.2% in women. Of these, 79.6% is getting help. There is a socioeconomic gradient in prevalence, not being observed in relation to assistance or not. We must deepen our understanding of the phenomenon and its evolution to which the ESCA is an essential tool.

[Individual and ecological factors related to the geographical variability of psychological distress among small areas: a multilevel analysis in Catalonia, Spain]. / Factores individuales y del entorno asociados a la variabilidad geográfica de los trastornos psicológicos entre areas pequeñas: un análisis multinivel.

BACKGROUND: To know the geographic distribution of the prevalence of psychological distress is important for mental health services planning. This study is aimed at identifying the individual factors and those related to the area of residence which may explain the geographic variability of psychological distress (by healthcare districts) in Catalonia. METHODS: The data was taken from the 1994 Catalonian Health Survey and from the 1996 Catalonia population statistics. The prevalence of psychological distress is estimated by age and sex and by healthcare district. In a two-level logic regression model, a study is made of the relationship between the individual variables (first level: health survey n = 12,455) and those of the area of residence (second level: the healthcare district, n = 46) to the geographic distribution of the prevalence of psychological distress. RESULTS: The significant variables at individual level are in men: age (45-64 years OR: 0.63 y > 64 years OR: 0.22), working status (no work OR: 1.60), number of chronic diseases (CD) (CD = 1 OR: 1.75 CD = 2 OR: 2.06 CD = 3-5 OR: 3.36 and CD > 5 OR: 8.9). In women: age (25-44 years OR: 0.63 45-64 years OR: 0.45 and > 64 years OR: 0.32), working status (no work OR: 1.30), number of chronic diseases (CD = 1 OR: 1.75 CD = 2 OR: 2.44 CD = 3-5 OR: 4.09 and CD > 5 OR: 11.14), and also the kind of parental household in women (single-parental OR: 1.42). The variables at the level of the area of residence are in migration (men OR: 1.55 and women OR: 1.68) and unemployment (men OR: 1.07 and women OR: 1.06). CONCLUSIONS: The individual factors do not suffice to explain the geographical variability of the prevalence of psychological distress, but the characteristics of the area of residence are also important.

Factores individuales y del entorno asociados a la variabilidad geográfica de los trastornos psicológicos entre áreas pequeñas: un análisis multinivel / Individual and ecological factors related to the geographical variability of psychological distress among small areas: a multilevel analysis in Catalonia, Spain

Fundamento: Para planificar las necesidades de servicios sanitarioses fundamental conocer la distribución de la morbilidad portrastornos psicológicos en el territorio así como los factores que ladeterminan. El objetivo es identificar los factores que pueden explicarla variabilidad geográfica de estos trastornos en Cataluña.Métodos: Los datos proceden de la Encuesta de Salud de l994 yde la estadística de población de l996 para Cataluña. Se estima la prevalenciade trastornos psicológicos por edad y sexo y por sector sanitario.En un modelo de regresión logística a dos niveles se estudia laasociación entre las variables individuales (primer nivel: Encuestade Salud n=12.455) y las de la zona de residencia (segundo nivel: elsector sanitario, n= 46) con la prevalencia de trastornos psicológicos.Resultados: Las variables individuales que influyen en las diferenciasentre sectores son: la edad (45-64 años OR:0,63 y >64 años:OR:0,22), la situación laboral (no trabaja OR:1,60) y el número detrastornos crónicos (TC) (TC=1 OR: 1,75 TC=2 OR: 2,06 TC=3-5OR:3,36 y TC>5 OR: 8,9) en hombres. En las mujeres, además deestas variables (edad 25-44 años OR: 0,63 45-64 años OR:0,45 y >64años OR: 0,32 la situación laboral no trabaja OR:1,30 y el número detrastornos crónicos (TC) TC=1 OR: 1,75 TC=2 OR: 2,44 TC=3-5OR:4,09 y TC>5 OR: 11,14), influye el tipo de hogar (monoparentalOR: 1,42). Las variables a nivel de la zona de residencia son la proporciónde inmigración (hombres OR:1,55 y mujeres OR:1,68) y dedesempleo (hombres OR:1,07 y mujeres OR:1,06).Conclusiones: Los factores individuales no son suficientes paraexplicar la variabilidad geográfica de la prevalencia de los trastornospsicológicos, ya que también influyen las características de la zonade residencia

Background: To know the geographic distribution of the prevalenceof psychological distress is important for mental healthservices planning. This study is aimed at identifying the individualfactors and those related to the area of residence which may explainthe geographic variability of psychological distress (by healthcaredistricts) in Catalonia.Methods: The data was taken from the 1994 Catalonian HealthSurvey and from the 1996 Catalonia population statistics. The prevalenceof psychological distress is estimated by age and sex and byhealthcare district. In a two-level logic regression model, a study ismade of the relationship between the individual variables (first level:health survey n=12,455) and those of the area of residence (secondlevel: the healthcare district, n=46) to the geographic distribution ofthe prevalence of psychological distress.Results: The significant variables at individual level are in men:age (45-64 years OR:0,63 y >64 years OR: 0,22), working status (nowork OR:1,60) , number of chronic diseases (CD) (CD=1 OR: 1,75CD=2 OR: 2,06 CD=3-5 OR:3,36 and CD>5 OR: 8,9). In women:age (25-44 years OR: 0,63 45-64 years OR:0,45 and >64 years OR:0,32), working status (no work OR:1,30), number of chronic diseases(CD=1 OR: 1,75 CD=2 OR: 2,44 CD=3-5 OR:4,09 and CD>5OR: 11,14), and also the kind of parental household in women (single-parental OR: 1,42). The variables at the level of the area of residenceare inmigration (men OR:1,55 and women OR:1,68) andunemployment (men OR:1,07 and women OR:1,06).Conclusions: The individual factors do not suffice to explain thegeographical variability of the prevalence of psychological distress,but the characteristics of the area of residence are also important

Total laparoscopic radical trachelectomy with intraoperative sentinel node identification for early cervical stump cancer.

A 60-year-old patient had undergone a subtotal hysterectomy through a standard laparotomy approach due to multiple uterine myomas 6 years before. She had a 1-month history of postmenopausal uterine bleeding. An endocervical polyp was found and excised. The histopathologic examination showed a poorly differentiated adenocarcinoma. Magnetic resonance imaging of the abdomen and pelvis revealed the mass (4x2x2.5 cm) without parametrial involvement previously identified on vaginal examination. There was no retroperitoneal adenopathy. The patient was successfully treated with total laparoscopic radical trachelectomy in association with laparoscopic intraoperative detection of the sentinel lymph node.

Total laparoscopic radical hysterectomy (type II-III) with pelvic lymphadenectomy in early invasive cervical cancer.

STUDY OBJECTIVE: To describe the feasibility and outcome of total laparoscopic radical hysterectomy with pelvic lymphadenectomy in early cervical cancer. DESIGN: Retrospective, nonrandomized study (Canadian Task Force classification II-2). SETTING: Acute-care, teaching hospital. PATIENTS: Twenty-seven nonconsecutive patients with International Federation of Gynecology and Obstetrics (FIGO) stage IA2 (n = 4) or IB1 (n = 23) cancer of the cervix. INTERVENTION: Laparoscopic type II (n = 9) or type III (n = 18) hysterectomy with systematic bilateral pelvic lymphadenectomy. Monopolar coagulation, vascular clips, and harmonic scalpel were used. Resection of the cardinal and uterosacral ligaments was performed with Endo GIA stapling and the harmonic scalpel. MEASUREMENTS AND MAIN RESULTS: Histopathologically, there were 20 cases of squamous carcinoma, 6 adenocarcinomas, and 1 adenosquamous carcinoma. The operation was performed entirely by laparoscopy in 26 patients. One patient underwent laparotomy because of equipment failure. The patients' mean age was 45.1 years (95% CI 41.7-48.4), with a median body mass index of 26.0 kg/m2. The mean number of resected pelvic nodes was 19.1 (95% CI 17.02-21.2). Three patients had microscopic metastatic nodal disease. The surgical margins were free of disease in all cases. The median blood loss was 400 mL (range 250-700 mL). The median length of stay was 5 days. Major intraoperative complications did not occur. All patients are free of disease after a median follow-up of 32 months (range 4-52 months). CONCLUSION: Radical hysterectomy can be successfully completed by laparoscopy in patients with early cervical cancer. This procedure may reduce the morbidity associated with abdominal or transvaginal radical hysterectomy.

Total laparoscopic radical hysterectomy with intraoperative sentinel node identification in patients with early invasive cervical cancer.

OBJECTIVES: To describe the feasibility and results of total laparoscopic radical hysterectomy with intraoperative sentinel lymph node identification in patients with early cervical cancer. METHODS: Between March 2001 and October 2003, 12 patients with FIGO stage IA(2) (n = 1) or IB(1) (n = 11) cancer of the cervix underwent surgical treatment through the laparoscopic route. All patients underwent a laparoscopic sentinel node identification with preoperative lymphoscintigraphy (technetium-99 m colloid albumin injection around the tumor) and intraoperative lymphatic mapping with isosulfan blue dye and a laparoscopic gamma probe followed by systematic bilateral pelvic lymphadenectomy and laparoscopic type II (n = 5) or type III (n = 7) hysterectomy. RESULTS: A mean of 2.5 sentinel nodes per patient (range 1-4) was detected, with a mean of 2.33 nodes per patient by gamma probe and a mean of 2 per patient after blue injection (combined detection rate 100%). The most frequent localization of the nodes was the interiliac region. Histopathologic examination of sentinel nodes including cytokeratin immunohistochemical analysis did not show metastasis. Microscopic nodal metastases were not found. The mean number of resected pelvic nodes was 18.6 per patient (range 10-28). The operation was performed entirely by laparoscopy in all patients and no case of laparotomy conversion was recorded. The mean duration of operation was 271 min (range 235-300), with a mean blood loss of 445 mL (range 240-800), and a mean length of stay of 5.25 days (range 3-10). No major intraoperative complications occurred. After a median follow-up of 20 months (range 5-34), all patients are free of disease. CONCLUSIONS: This study shows the feasibility of the combination of laparoscopic intraoperative sentinel node mapping and laparoscopic radical surgery in the context of minimally invasive surgery for the management of patients with early cervical cancer.

Surveillance programme on dioxin levels in ambient air sites in Catalonia (Spain).

As part of a survey programme conducted by the Environment Department of the Autonomous Government of Catalonia in collaboration with the Spanish Council for Scientific Research (CSIC), dioxin concentrations in ambient air were measured in the four provinces of Catalonia (Spain). The study was also performed with the intention of providing data as a basis for future monitoring and evaluation of temporal trends in ambient air. Thus, 91 samples were collected in 25 different sites (rural, urban, suburban and industrial) between 1994 and 2000. The levels revealed a variable content of PCDDs/PCDFs depending both on the area and the contamination source. In particular, industrial areas presented levels ranging from 18 to 954 fg I-TEQ/m3. However, findings in urban and suburban sites varied between 13 and 357 fg I-TEQ/m3. As expected, the lowest levels were found in rural areas with levels between 5 and 125 fg I-TEQ/m3.

Low fusion rate after L5-S1 laparoscopic anterior lumbar interbody fusion using twin stand-alone carbon fiber cages.

STUDY DESIGN: Prospective study of a cohort of patients who underwent L5-S1 laparoscopic anterior lumbar interbody fusion. OBJECTIVES: To assess the fusion rate and the clinical outcome more than 2 years after L5-S1 laparoscopic anterior lumbar interbody fusion using twin stand-alone carbon-fiber cages. SUMMARY OF BACKGROUND DATA: The first reports on laparoscopic anterior lumbar interbody fusion using stand-alone cages appeared in 1995. Since then several articles have reported contradictory data regarding fusion rate. There are no publications describing the fusion rate of stand-alone lumbar carbon-fiber cages. METHODS: The authors evaluated 12 patients (mean age 36.5 years) in whom endoscopic L5-S1 anterior lumbar interbody fusion was performed using twin stand-alone laparoscopic carbon-fiber cages. Clinical evaluation was carried out prospectively by the use of three self-evaluation scales. Radiologic evaluation was performed by an independent radiologist using dynamic flexion-extension films and CT scans at 6 and 12 months after surgery and subsequently every year until fusion was demonstrated. RESULTS: After a mean follow-up of 36.6 months (range 24-63 months) the clinical condition of the patients was significantly better than their preoperative status: visual analog scale (P < 0.01), Prolo score (P < 0.05), and Waddell Disability Index (P < 0.01). L5-S1 mobility did not exceed 5 degrees in any dynamic study. However, the overall CT scan fusion rate at 2 years of follow-up was 16.6%. Three years after surgery, CT demonstrated fusion in one of five patients. CONCLUSION: Two years after endoscopic L5-S1 anterior lumbar interbody fusion using twin stand-alone laparoscopic carbon-fiber cages, the fusion rate was unacceptably low. However, the clinical outcomes of these patients were significantly improved compared with their preoperative status.