Prognostic significance using histologic subtype in stage I lung adenocarcinoma.

Background: The pathologic feature of lung adenocarcinoma is extremely complex because the prognosis of same-stage lung adenocarcinoma significantly differs because of pathological diversity. This study aimed to evaluate the clinical association between histologic subtype and recurrence. Further, the prognostic significance of histologic subtype in stage I lung adenocarcinoma was examined.

Investigation of an Optimal Material Addition Rate for Energy Consumption and Dimensional Accuracy in Fused Filament Fabrication of CFR-PEEK.

The material addition rate (MAR) of fused filament fabrication (FFF) is an indicator of process efficiency varied by process parameter settings, which affects energy consumption and part quality in FFF. This study aims to identify the optimal MAR of FFF using carbon-fiber-reinforced polyether-ether-ketone (CFR-PEEK) by considering a trade-off between energy consumption and the dimensional accuracy of FFF outputs. A design of experiments considering two main process parameters is planned to print three sample types through FFF for CFR-PEEK.

Significance of histologic subtype size as a prognostic indicator in stage IA lung adenocarcinoma.

Background: Predicting prognosis is complex due to a unique characteristic in stage IA lung adenocarcinoma. The feature indicated heterogeneous histologic subtype and ground glass opacity (GGO). Many studies demonstrated different prognoses according to histologic subtype or non-GGO lesion.

Successful Endoscopic Vacuum Therapy for Extensive Gastric Tubing Necrosis after Ivor-Lewis Esophagectomy: A Case Report.

The stomach has become the most commonly used site for grafts to replace the esophagus in esophageal cancer surgery because of its good blood supply and ability to enable single-reconstruction anastomosis. However, anastomotic failure is a serious complication after esophageal cancer surgery. Unlike anastomotic leakage due to local ischemia, gastric tube necrosis is a life-threatening condition with a high mortality rate.

Comparison of clinical results between high grade patterns in stage I lung adenocarcinoma.

Background: The histological subtype has been introduced in invasive lung adenocarcinoma. The predominant micropapillary and solid subtypes are categorized as high-grade patterns and provide a worse prognosis. However, the prognostic analysis of high-grade patterns has not previously been fully investigated.

Predicting prognosis using a pathological tumor cell proportion in stage I lung adenocarcinoma.

Background: Tumor size is a valuable prognostic factor because it is considered a measure of tumor burden. However, it is not always correlated with the tumor burden. This study aimed to identify the prognostic role of pathological tumor proportional size using the proportion of tumor cells on the pathologic report after curative resection in pathologic stage I lung adenocarcinoma.

Simulating energy consumption based on material addition rates for material extrusion of CFR-PEEK: a trade-off between energy costs and cycle time.

While many studies for material extrusion-based additive manufacturing (AM) of polymers focus on experimental approaches to evaluate relevant performance measures from process parameters, there is a lack of discussion to connect experimental results with useful applications. Also, one of the major deficiencies in the application literature is a trade-off analysis between energy costs and cycle time (time to produce an item from the beginning to the end) since improving these two measures simultaneously is challenging. Thus, this paper proposes an energy simulation method for performing a trade-off analysis between energy costs and cycle time using combinations of major AM process parameters for material extrusion.

Significant difference in recurrence according to the proportion of high grade patterns in stage IA lung adenocarcinoma.

Background: Patients with early lung cancer are the best candidates for surgical resection. However, those patients with high grade patterns (micropapillary or solid) do not have a good prognosis, even if they have been diagnosed with stage I lung adenocarcinoma. A new modified grading system has been introduced and this study aimed to identify the prognostic role of the new grading system in patients with stage IA lung adenocarcinoma.

Prognostic impact according to the proportion of the lepidic subtype in stage IA acinar-predominant lung adenocarcinoma.

Background: Adenocarcinoma is the most common type of lung cancer and most adenocarcinomas have heterogeneous subtypes. Acinar-predominant adenocarcinoma is the most common. This study aimed to identify the prognostic impact of other mixed histological subtypes in acinar-predominant lung adenocarcinoma.

Industrial Energy Assessment Training Effectiveness Evaluation: An Eye-Tracking Study.

It is essential to understand the effectiveness of any training program so it can be improved accordingly. Various studies have applied standard metrics for the evaluation of visual behavior to recognize the areas of interest that attract individuals' attention as there is a high correlation between attentional behavior and where one is focusing on. However, through reviewing the literature, we believe that studies that applied eye-tracking technologies for training purposes are still limited, especially in the industrial energy assessment training field.

Prediction Model for Airborne Microorganisms Using Particle Number Concentration as Surrogate Markers in Hospital Environment.

Indoor microbiological air quality, including airborne bacteria and fungi, is associated with hospital-acquired infections (HAIs) and emerging as an environmental issue in hospital environment. Many studies have been carried out based on culture-based methods to evaluate bioaerosol level. However, conventional biomonitoring requires laborious process and specialists, and cannot provide data quickly.

Use of imaging studies to predict postoperative recurrences of primary spontaneous pneumothorax.

Background: Bullectomy with pleural procedure is the most effective means of treating primary spontaneous pneumothorax (PSP). However, recurrences after thoracoscopic bullectomy are unexpectedly frequent. Our aim was to identify the premonitory imaging features after thoracoscopic bullectomy that may associate with recurrences in PSP.

Should We Consider the Resected Lung Volume in Primary Spontaneous Pneumothorax?

Background: Although bullectomy is the most curative treatment in primary spontaneous pneumothorax (PSP), postoperative recurrence is not uncommon. New bulla formation at the staple line is the most common cause of recurrence. However, the mechanism is not known.

Effect of histological subtype and treatment modalities on T1-2 N0-1 small cell lung cancer: A population-based study.

Background: Combined small cell lung cancer (C-SCLC) is rare and its clinical features, appropriate treatment, and prognosis are poorly understood. Reports conflict over the prognosis of C-SCLCs compared to pure small cell lung cancer.

Methods: The records of patients diagnosed with primary SCLC from 1988 to 2014 were extracted from the Surveillance, Epidemiology, and End Results database.

Does oxygen therapy increase the resolution rate of primary spontaneous pneumothorax?

Background: Patients with small pneumothoraces are usually treated with oxygen therapy. However, evidence that oxygen therapy increases resolution rate is based on small populations with secondary spontaneous pneumothorax. Therefore, this study aimed to confirm whether oxygen therapy increases the resolution rate of primary spontaneous pneumothorax (PSP).

Minimally invasive Ivor Lewis esophagectomy for esophageal cancer.

Esophageal cancer is the malignant tumor arising from the esophagus and has a poor prognosis. Squamous cell carcinoma and adenocarcinoma are the main subtypes of esophageal cancer with different risk factors. In the early stage, surgical resection is the most curative treatment modality.

Successful thoracoscopic resection of a large mediastinal angiomyolipoma.

An angiomyolipoma (AML) is a benign mesenchymal tumor characterized by proliferation of mature vessels, smooth muscle, and adipose tissue. AMLs most commonly occur in the kidney but have been reported in a variety of extrarenal sites. Mediastinal AMLs are extremely rare.

Does 11.5 mm guided single port surgery has clinical advantage than multi-port thoracoscopic surgery in spontaneous pneumothorax?

Background: Video-assisted thoracoscopic surgery (VATS) has been widely used for spontaneous pneumothorax (SP). In recent years, thoracic surgeons have attempted single incision or single port surgery with the development of surgical technology and skills. Theoretically, single port surgery is expected to provide benefits such as less pain and early recovery.

High Intrathoracic Anastomosis with Thoracoscopy Is Safe and Feasible for Treatment of Esophageal Squamous Cell Carcinoma.

Background: Minimally invasive esophagectomy (MIE) has the potential to reduce the morbidity and mortality of esophageal cancer surgery. Esophageal squamous cell carcinoma (ESCC) has a high incidence of earlier lymphatic spread and is usually located more proximal to the incisor than esophageal adenocarcinoma; consequently, the anastomosis should be made more proximal in the thorax or in the neck. We adopted the proximal intrathoracic anastomotic technique using thoracoscopy for mid-to-lower ESCC.

Air leakage on the postoperative day: powerful factor of postoperative recurrence after thoracoscopic bullectomy.

Background: Primary spontaneous pneumothorax (PSP) is a relatively common disorder in young patients. Although various surgical techniques have been introduced, recurrence after video-assisted thoracoscopic surgery (VATS) remains high. The aim of study was to identify the risk factors for postoperative recurrence after thoracoscopic bullectomy in the spontaneous pneumothorax.

Clinical experience of spontaneous pneumomediastinum: diagnosis and treatment.

Background: Spontaneous pneumomediastinum (SPM) is a benign disease with a variety degree of severity but definite treatment modality is not clearly identified with its rarity. The purpose of this study was to review our experience and discuss the management of SPM according to the severity of disease.

Methods: From March 1996 to December 2012, total 64 patients were enrolled and classified as mild, moderate and severe groups and subsequent clinical courses were analyzed retrospectively.

Endobronchial angiofibroma in the aberrant tracheal bronchus presenting as spontaneous pneumomediastinum.

Background: Spontaneous pneumomediastinum is a self-limiting benign disease but abnormal bronchial lesions can be rarely found incidentally, and in selected cases will require surgical resection.

Materials And Methods: A 38-year-old man presented with a spontaneous pneumomediastinum. Chest computed tomography revealed an incidental linear endobronchial tumour in the aberrant tracheal bronchus.

When Is the Optimal Timing of the Surgical Treatment for Secondary Spontaneous Pneumothorax?

 The definition of spontaneous pneumothorax is accumulation of air in the pleural space, resulting in dyspnea or chest pain. Unlike primary spontaneous pneumothorax, secondary pneumothorax can be a life-threatening condition and spontaneous healing rate is uncommon. Although surgery is the most effective treatment modality for pneumothorax, surgical management and timing is difficult where there is underlying lung disease and/or medical comorbidities.

A next-generation pectus excavatum repair technique: new devices make a difference.

Background: When performing pectus excavatum repair using a pectus bar, stabilization of the bar is crucial. However, since 2007, we have been developing new devices to achieve a bar dislocation rate of zero. The purpose of this study is to determine whether our next-generation approach makes it possible to achieve our goal.