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Here, we report a case of metastatic Epstein–Barr virus (EBV)‐related primary pulmonary lymphoepithelioma‐like carcinoma (PPLELC) in a young, nonsmoking female who responded well to treatment with two types of immune checkpoint inhibitors (ICIs). This is the first case report of a favorable outcome to ICIs in the late‐line treatment of advanced PPLELC patients with programmed cell death‐ligand 1 (PD‐L1) expression. Primary pulmonary lymphoepithelioma‐like carcinoma (PPLELC) is a rare subtype of non–small‐cell lung cancer. Here, is the first reported case of a favorable outcome to two types of immune checkpoint inhibitors in advanced PPLELC patients with PD‐L1 expression.

We report a case of mediastinal lymphatic venous malformations (LVM) in a 11‐year‐old boy who presented with chest pain after jumping into a swimming pool, with review of the literature. A superior mediastinal mass was incidentally found from the chest x‐ray. Chest computed tomography revealed a large heterogenous mass at the left‐sided mediastinum containing fat, minimal enhancing solid portion, non‐enhancing cystic portion and calcification. Because of the large size of the mass, the patient underwent tumour removal. Operative findings gave a definitive diagnosis of mediastinal LVM. The patient had an uneventful clinical course and was discharged without complication. This report highlights that it is possible to misdiagnose mediastinal LVM especially if its predominant portion is lymphatic tissue with only minimal contrast enhancement. Tissue biopsy must be avoided because it may lead to haemorrhagic complication. This report highlights that it is possible to misdiagnose mediastinal lymphatic‐venous malformation especially if its predominant portion is lymphatic tissue with only minimal contrast enhancement. Tissue biopsy must be avoided because it may lead to haemorrhagic complication.

A woman in her 50s with relapsing polychondritis and ulcerative colitis presented with progressive dyspnoea and dry cough. Physical examination revealed platythorax and coarse crackles in the upper lung zones. High-resolution CT showed bilateral apical pleural thickening and upper lobe fibrosis, while pulmonary function tests indicated a restrictive pattern. Histopathology confirmed pleuroparenchymal fibroelastosis (PPFE) based on a wedge resection and surgical pleurodesis performed due to spontaneous pneumothorax. The patient was treated with prednisolone, which initially stabilised her condition; however, the disease later progressed, leading to respiratory failure. This case highlights the potential association between PPFE and ulcerative colitis, emphasising the need for heightened awareness of atypical pulmonary manifestations in patients with inflammatory bowel disease. Early recognition and a multidisciplinary approach are essential for effective diagnosis and management of this rare interstitial lung disease.

Background The etiology of severe pneumonia is frequently not identified by routine disease surveillance in Thailand. Since 2010, the Thailand Ministry of Public Health (MOPH) and US CDC have conducted surveillance to detect known and new etiologies of severe pneumonia. Methods Surveillance for severe community-acquired pneumonia was initiated in December 2010 among 30 hospitals in 17 provinces covering all regions of Thailand. Interlinked clinical, laboratory, pathological and epidemiological components of the network were created with specialized guidelines for each to aid case investigation and notification. Severe pneumonia was defined as chest-radiograph confirmed pneumonia of unknown etiology in a patient hospitalized ≤48 h and requiring intubation with ventilator support or who died within 48 h after hospitalization; patients with underlying chronic pulmonary or neurological disease were excluded. Respiratory and pathological specimens were tested by reverse transcription polymerase chain reaction for nine viruses, including Middle East Respiratory Syndrome Coronavirus (MERS-CoV), and 14 bacteria. Cases were reported via a secure web-based system. Results Of specimens from 972 cases available for testing during December 2010 through December 2015, 589 (60.6%) had a potential etiology identified; 399 (67.8%) were from children aged < 5 years. At least one viral agent was detected in 394 (40.5%) cases, with the most common of single vial pathogen detected being respiratory syncytial virus (RSV) (110/589, 18.7%) especially in children under 5 years. Bacterial pathogens were detected in 341 cases of which 67 cases had apparent mixed infections. The system added MERS-CoV testing in September 2012 as part of Thailand’s outbreak preparedness; no cases were identified from the 767 samples tested. Conclusions Enhanced surveillance improved the understanding of the etiology of severe pneumonia cases and improved the MOPH’s preparedness and response capacity for emerging respiratory pathogens in Thailand thereby enhanced global health security. Guidelines for investigation of severe pneumonia from this project were incorporated into surveillance and research activities within Thailand and shared for adaption by other countries.

Pulmonary alveolar microlithiasis is a rare pulmonary disorder that is caused by abnormal sodium‐dependent phosphate co‐transporter from the mutation of SLC34A2 gene, leading to accumulation of microliths in the alveoli. We report the extensive pulmonary alveolar microlithiasis in an elderly woman who presented with progressive dyspnea for 2 months. Chest radiograph revealed diffuse pulmonary calcification. Tissue histopathology from open lung biopsy demonstrated widespread intra‐alveolar laminated calcium deposits compatible with pulmonary alveolar microlithiasis. Chest radiograph and HRCT of chest show bilateral extensive calcification diffusely involving both lungs in a 70‐year‐old female patient who presented with progressive dyspnea on exertion and hypoxemia for 2 months. Pulmonary alveolar microlithiasis (PAM) was diagnosed by tissue histopathology from open lung biopsy.

While squamous cell carcinoma (SCC) is the most common tracheal malignancy, few reports describe the pathologic considerations that may guide intraoperative decisions and prognostic assessment. We reviewed 59 tracheal SCC treated between 1985 and 2008 by segmental resection of the trachea, including resection of the carina in 24% and inferior larynx in 14%. We classified these tumors by grading histologic differentiation and microscopic features used in SCC of other sites. Of 59 tumors, 24% (14 of 59) were well differentiated, 49% (29 of 59) were moderately differentiated, and 27% (16 of 59) were poorly differentiated. Unfavorable prognostic factors were tumor extension into the thyroid gland (all of five so-afflicted patients died of tumor progression within 3 years) and lymphatic invasion (mean survival 4.6 versus 7.6 years). Keratinization, dyskeratosis, acantholysis, necrosis, and tumor thickness did not predict prognosis. As surgical resection is the only curative treatment; the surgeon should establish clean lines of resection using, as appropriate, intraoperative frozen section. The pathologist can provide additional important prognostic information, including tumor differentiation and extent, invasion of surgical margins, and extension into the thyroid.

The first human infections with influenza A(H1N1)pdm09 virus were confirmed in April 2009. We describe the clinical and epidemiological characteristics of influenza A(H1N1)pdm09-associated pneumonia deaths in Thailand from May 2009-January 2010. We identified influenza A(H1N1)pdm09-associated pneumonia deaths from a national influenza surveillance system and performed detailed reviews of a subset. Of 198 deaths reported, 49% were male and the median age was 37 years; 146 (73%) were 20-60 years. Among 90 deaths with records available for review, 46% had no identified risk factors for severe influenza. Eighty-eight patients (98%) received antiviral treatment, but only 16 (18%) initiated therapy within 48 hours of symptom onset. Most influenza A(H1N1)pdm09 pneumonia fatalities in Thailand occurred in adults aged 20-60 years. Nearly half lacked high-risk conditions. Antiviral treatment recommendations may be especially important early in a pandemic before vaccine is available. Treatment should be considered as soon as influenza is suspected.

Nonspecific interstitial pneumonia (NSIP) is a rare pulmonary complication in systemic juvenile idiopathic arthritis (SJIA). To present a case with NSIP in SJIA. Case report. We report the case of a 4-year-old boy with SJIA complicated by macrophage activation syndrome (MAS) refractory to conventional therapy, and who later developed NSIP confirmed by high-resolution computerized tomography of the chest and lung histopathology. The patient received tocilizumab, a monoclonal antibody to interleukin-6 receptor, to control his disease. Data relating to tocilizumab treatment of NSIP in refractory SJIA is limited. The data from this case report suggests that NSIP could be a pulmonary complication of SJIA complicated by MAS that is refractory to conventional therapy. Early initiation of tocilizumab should be considered to achieve disease remission in this pediatric patient population.

The first human infections with influenza A(H1N1)pdm09 virus were confirmed in April 2009. We describe the clinical and epidemiological characteristics of influenza A(H1N1)pdm09-associated pneumonia deaths in Thailand from May 2009-January 2010. We identified influenza A(H1N1)pdm09-associated pneumonia deaths from a national influenza surveillance system and performed detailed reviews of a subset. Of 198 deaths reported, 49% were male and the median age was 37 years; 146 (73%) were 20-60 years. Among 90 deaths with records available for review, 46% had no identified risk factors for severe influenza. Eighty-eight patients (98%) received antiviral treatment, but only 16 (18%) initiated therapy within 48 hours of symptom onset. Most influenza A(H1N1)pdm09 pneumonia fatalities in Thailand occurred in adults aged 20-60 years. Nearly half lacked high-risk conditions. Antiviral treatment recommendations may be especially important early in a pandemic before vaccine is available. Treatment should be considered as soon as influenza is suspected.