[Comparative analysis of video-assisted thoracic surgery versus open resection for early-stage thymoma]. / Análisis comparativo del abordaje para el tratamiento del timoma estadio i-ii: VATS versus abordaje convencional.

BACKGROUND: Video-assisted thoracic surgery (VATS) has significantly developed over the last decade. However, a VATS approach for thymoma remains controversial. The aim of this study was to evaluate the feasibility of VATS thymectomy for the treatment of early-stage thymoma and to compare the outcomes with open resection. METHODS: A comparative study of 59 patients who underwent surgical resection for early stage thymoma (VATS: 44 and open resection: 15) between 1993 and 2011 was performed. Data of patient characteristics, morbidity, mortality, length of hospital stay, the relationship between miasthenia gravis-thymoma, recurrence, and survival were collected for statistical analysis. RESULTS: Thymomas were classified according to Masaoka staging system: 38 in stage I (VATS group: 29 and open group: 9) and 21 in stage II (VATS group: 15 and open group: 6). The mean tumor size in the open group was 7.6cm (13-4cm) and in the VATS group 6.9cm (12-2.5cm). The average length of stay was shorter in the VATS group than in the open group (P<.001). No significant differences were found in the estimated recurrence-free and overall 5-year survival rates (96% vs. 100%) between the 2 groups. CONCLUSIONS: VATS thymectomy for early-stage thymoma is technically feasible and is associated with a shorter hospital stay. The 5-year oncologic outcomes were similar in the open and VATS groups.

Sympathetic chain clipping for hyperhidrosis is not a reversible procedure.

BACKGROUND: Many techniques have been used to treat palmar hyperhidrosis. Compensatory sweating is a difficult adverse effect. Clipping has been proposed because of its supposed reversibility when clips are removed at a later date. The primary aims of this article are to investigate the neuronal lesion of the sympathetic chain caused by clipping and to study the possibility of regeneration after removal of the clips. METHODS: We performed an experimental study at the Minimally Invasive Surgery Centre Jesus Uson in Caceres (Spain). We used a swine model, performing clipping, unclipping, and extirpation of different segments of sympathetic chain with clips and after clip removal, following a chronogram of 10, 20, and 30 days. Pathologic studies of specimens and statistics were done at the University of Seville. RESULTS: Ten days after clipping, all sympathetic chains displayed evident Wallerian degeneration. Twenty days after clipping, Wallerian degeneration of myelinated fibers was more widespread and also more striking. Thirty days after clipping, a very marked macrophagic reaction was visible, with multiple signs of phagocytosis of myelin debris. By 30 days post operation and 20 days after clip removal, a few residual myelin and amyelinated fibers were visible. These findings suggest that axon regeneration is not possible. CONCLUSIONS: There are Wallerian degeneration and axon loss 10 days after clipping. The almost total absence of myelinated and amyelinated fibers following clip removal suggests that there was no nerve regeneration, and that therefore clipping cannot be considered a reversible technique.

[Pericardial window by videothorascopy]. / Ventana pericárdica por videotoracoscopia.

INTRODUCTION: Pericardial effusion is a clinical condition requiring multidisciplinary management. There are several surgical techniques for its diagnosis and treatment. In the present study we report our experience in performing a pericardial window (PW) by videothorascopy. MATERIAL AND METHODS: We performed surgery on 56 patients (20 females and 36 males), with a mean age of 56±1.22 years, and diagnosed with moderate to severe chronic pericardial effusion. The side chosen for the approach depended on whether there was an associated pleural effusion or lung lesion, and if not the left side was chosen. RESULTS: The mean duration of the surgery was 37.6±16 minutes. The definitive diagnoses were malignant processes in 23% of cases, including bronchogenic carcinoma and breast cancer. The intra-operative mortality was 0%. CONCLUSIONS: Videothorascopic pericardial window is an effective and safe technique for the diagnosis and treatment of chronic pericardial effusion, and which enables it to be drained and perform a pleuro-pulmonary and/or mediastinal biopsy during the same surgical act.

How Long does it Take to Examine Young Children with the Caries ICDAS System and how do they Respond?

A caries-epidemiological study using the ICDASepi-merged system was conducted in Colombian young children. This study aimed at associating the time needed for the clinical examination of caries and caries risk in 1 to 5-year-old children according to age and caries risk, and to assess behavior and child pain self-perception during examination according to age. After IRB approval and given parents/caregivers' informed consent, seven trained examiners assessed 1 to 5-year olds in kindergartens under local field conditions. ICDASepi-merged caries experience (depiMEmf) was assessed as follows: Initial-depi (ICDAS 1/2 without air-drying); Moderate-dM (ICDAS 3,4); Extensive-dE (ICDAS 5,6) lesions; due-to-caries fillings-f and missing-m surfaces/teeth. Caries risk was assessed with Cariogram®. Child's behavior (Frankl-Behavior-Rating-Scale) and self-perceived pain (Visual-Analogue-Scale-of-Faces) during examination were evaluated. Clinical examination time was recorded with a stopwatch. A total of 592 children participated (1-yr.: n=31; 2-yrs.: n=96; 3-yrs.: n=155; 4-yrs.: n=209, 5-yrs.: n=101). The depiMEmfs prevalence was of 79.9% and the mean 8.4±10.4. Most were high-caries-risk children (68.9%). The majority (58.9%) showed ≥ positive-behavior and ≤ light-pain self-perception (88.4%). Mean clinical examination time was around 3.5 minutes (216.9±133.9 seconds). For 5-yr. olds it corresponded to 4 minutes (240.4±145.0 seconds) vs. 2 minutes (122.8±80.1 seconds) for 1-yr. olds (Kruskal-Wallis; p=0.00). For high- and low-caries risk children it was around 4.3 minutes (255.7±118.5 seconds) and 3.3 minutes (201.3±129.4 seconds), respectively (ANOVA; p=0.01). This study demonstrates using the ICDAS system in young children is feasible, taking less than 4 minutes for the clinical examination without children behavior/pain self-perception issues.

Extirpación de hamartoma endobronquial con Ligasure(R) / Resection of Endobronchial Hamartoma Using the Ligasure(R) Technique

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Experience and development of the video-assisted thoracic surgery lobectomy technique: comparative study with conventional surgery in stage I non-small cell lung cancer.

BACKGROUND: Surgical treatment of stage I non-small cell lung cancer (NSCLC) can be performed either by thoracotomy or by employing video-assisted thoracic surgery (VATS). The aim of this study was to compare long and short-term results of conventional surgery (CS) vs. VATS lobectomy in the treatment of stage I NSCLC. MATERIALS AND METHODS: We performed a retrospective, analytical study of patients undergoing surgery for stage I NSCLC during the period January 1993 to December 2005. The variables analyzed were overall survival, recurrence, distant metastasis, morbidity, mortality and hospital stay. During this period, 256 anatomic lung resections were performed: 141 by CS and 115 by VATS. RESULTS: There were statistically significant differences in: (i)mean hospital stay in patients with no complications (VATS group: 4.3 days vs. CS group: 8.7 days, P=.0001); (ii)mean hospital stay in patients with complications (VATS: 7.2 days vs. CS: 13.7 days, P=.0001), and (iii)morbidity (VATS: 15.6% vs. CS: 36.52%, P=.0001). No statistically significant differences were found in: (i)mortality (VATS: 2.17% vs. CS: 1.7%, P=.88); (ii)5-year overall survival (VATS: 68.1% vs. CS: 63.8%), and (iii) local recurrence and distant metastasis (P=.82). CONCLUSIONS: VATS lobectomy is a safe and effective approach, with a shorter hospital stay and lower morbidity than CS; no statistically significant differences were observed in survival in patients undergoing surgery for stage I NSCLC.

Endobronchial lipoma: a rare cause of bronchial occlusion.

Endobronchial lipoma is a rare benign neoplasm of the tracheobronchial tree. Despite its benign nature, associated endoluminal polypoid growth can cause bronchial occlusion. In this paper, we present the consequences of a late diagnosis of this condition.

How long does it take to examine young children with the caries icdas system and how do they respond?

Abstract A caries-epidemiological study using the ICDASepi-merged system was conducted in Colombian young children. This study aimed at associating the time needed for the clinical examination of caries and caries risk in 1 to 5-year-old children according to age and caries risk, and to assess behavior and child pain self-perception during examination according to age. After IRB approval and given parents/caregivers' informed consent, seven trained examiners assessed 1 to 5-year olds in kindergartens under local field conditions. ICDASepi-merged caries experience (depiMEmf) was assessed as follows: Initial-depi (ICDAS 1/2 without air-drying); Moderate-dM (ICDAS 3,4); Extensive-dE (ICDAS 5,6) lesions; due-to-caries fillings-f and missing-m surfaces/teeth. Caries risk was assessed with Cariogram®. Child's behavior (Frankl-Behavior-Rating-Scale) and self-perceived pain (Visual-Analogue-Scale-of-Faces) during examination were evaluated. Clinical examination time was recorded with a stopwatch. A total of 592 children participated (1-yr.: n=31; 2-yrs.: n=96; 3-yrs.: n=155; 4-yrs.: n=209, 5-yrs.: n=101). The depiMEmfs prevalence was of 79.9% and the mean 8.4±10.4. Most were high-caries-risk children (68.9%). The majority (58.9%) showed ≥ positive-behavior and ≤ light-pain self-perception (88.4%). Mean clinical examination time was around 3.5 minutes (216.9±133.9 seconds). For 5-yr. olds it corresponded to 4 minutes (240.4±145.0 seconds) vs. 2 minutes (122.8±80.1 seconds) for 1-yr. olds (Kruskal-Wallis; p=0.00). For high- and low-caries risk children it was around 4.3 minutes (255.7±118.5 seconds) and 3.3 minutes (201.3±129.4 seconds), respectively (ANOVA; p=0.01). This study demonstrates using the ICDAS system in young children is feasible, taking less than 4 minutes for the clinical examination without children behavior/pain self-perception issues.

Resumo Um estudo epidemiológico de cárie usando o sistema ICDAS foi realizado em crianças pequenas colombianas. O objetivo deste estudo foi associar o tempo necessário para o exame clínico da cárie e o risco de cárie em crianças de 1 a 5 anos de acordo com a idade e o risco de cárie e avaliar a autopercepção do comportamento e da dor na criança durante o exame, de acordo com a idade. Após a aprovação do comitê de ética e do consentimento informado dos pais/responsáveis, sete examinadores treinados avaliaram crianças de 1 a 5 anos em creches em condições locais de campo. A experiência de cárie do ICDAS (depiMEmf) foi avaliada da seguinte forma: Epi-depi inicial (ICDAS 1/2 sem secagem ao ar); Moderado-dM (ICDAS 3,4); lesões extensas de dE (ICDAS 5,6); restaurações devido a cárie -f e superfícies/dentes ausentes-m. O risco de cárie foi avaliado com Cariogram®. O comportamento de crianças (Frankl-Behavior-Rating-Scale) e a autopercepção de dor (Escala Visual-Analógica-de-Rostos) durante o exame foram avaliados. O tempo de exame clínico foi registrado com um cronômetro. 592 crianças participaram (1 ano: n = 31; 2 anos: n = 96; 3 anos: n = 155; 4 anos: n = 209, 5 anos: n = 101 ). A prevalência do depiMEmfs foi de 79,9% e a média de 8,4 ± 10,4. A maioria era de crianças com alto risco de cárie (68,9%). A maioria (58,9%) apresentou ≥ comportamento positivo e ≤ autopercepção de dor leve (88,4%). O tempo médio de exame clínico foi em torno de 3,5 min (216,9 ± 133,9 s). Para crianças de 5 anos, correspondeu a 4 min (240,4 ± 145,0 s) vs. 2 min (122,8 ± 80,1 s) para crianças de 1 ano de idade (Kruskal-Wallis; p = 0,00). Para crianças com alto e baixo risco de cárie, foi em torno de 4,3 min (255,7 ± 118,5 s) e 3,3 min (201,3 ± 129,4 s), respectivamente (ANOVA; p = 0,01). Este estudo demonstra que a utilização do sistema ICDAS em crianças pequenas é viável, levando menos de 4 min para o exame clínico sem problemas de autopercepção de comportamento/ dor em crianças.