A proposed prognostic prediction score for pleuroparenchymal fibroelastosis.

Background: Clinical course of pleuroparenchymal fibroelastosis (PPFE) shows considerable variation among patients, but there is no established prognostic prediction model for PPFE.

Methods: The prediction model was developed using retrospective data from two cohorts: our single-center cohort and a nationwide multicenter cohort involving 21 institutions. Cox regression analyses were used to identify prognostic factors.

Alveolar Epithelial Denudation Is a Major Factor in the Pathogenesis of Pleuroparenchymal Fibroelastosis.

The pathogenesis of pleuroparenchymal fibroelastosis (PPFE), a rare interstitial lung disease, remains unclear. Based on previous reports and our experience, we hypothesized that alveolar epithelial denudation (AED) was involved in the pathogenesis of PPFE. This multicenter retrospective study investigated the percentage of AED and the features of the denudated areas in 26 PPFE cases, 30 idiopathic pulmonary fibrosis (IPF) cases, and 29 controls.

The pathogenesis and pathology of idiopathic pleuroparenchymal fibroelastosis.

Idiopathic pleuroparenchymal fibroelastosis (IPPFE) is a rare subtype of idiopathic interstitial pneumonias that consists of elastofibrosis involving the lung parenchyma and pleural collagenous fibrosis predominantly located in the upper lobes. IPPFE has various distinct clinical and physiological characteristics, including platythorax and a marked decrease of forced vital capacity with an increased residual volume on a respiratory function test. The concept of IPPFE is now widely recognized and some diagnostic criteria have been proposed.

Role of alveolar collapse in idiopathic pleuroparenchymal fibroelastosis.

Background: Zonal aggregates of elastic fibres (zonal elastosis) and intraalveolar collagenosis with septal elastosis are histologic components of subpleural fibroelastosis of idiopathic pleuroparenchymal fibroelastosis (IPPFE). Zonal elastosis is considered to result from alveolar collapse, but this mechanism has not been fully justified.

Methods: We immunohistochemically attempted to identify epithelial cells in zonal elastosis of 10 patients with IPPFE.

Remodeling of the pulmonary artery in idiopathic pleuroparenchymal fibroelastosis.

Idiopathic pleuroparenchymal fibroelastosis (IPPFE) is a rare subtype of idiopathic interstitial pneumonia that consists of alveolar septal elastosis and intra-alveolar collagenosis, which is predominantly located in the upper lobes. The aim of this study was to examine the remodeling of the pulmonary arteries in patients with IPPFE. This study included 18 patients with IPPFE, 24 patients with idiopathic pulmonary fibrosis (IPF), and 5 patients without pulmonary disease as controls.

The similarities and differences between pleuroparenchymal fibroelastosis and idiopathic pulmonary fibrosis.

The idiopathic form of pleuroparenchymal fibroelastosis (PPFE) is categorized as a rare idiopathic interstitial pneumonia in the current classification. The majority of PPFE cases are idiopathic, but many predisposing factors or comorbidities have been reported. Although histological PPFE is predominantly located in the upper lobes, which are less often affected by fibrosis in patients with idiopathic pulmonary fibrosis (IPF), the clinical course of PPFE is seemingly similar to that of IPF.

Effects of tiotropium on lung function in current smokers and never smokers with bronchial asthma.

The effects of tiotropium, an inhaled long-acting muscarinic antagonist, on lung function were investigated in current smokers and nonsmokers with asthma treated with inhaled corticosteroids (ICSs) and other asthma controllers: inhaled long-acting β agonists, leukotriene receptor antagonists, and/or theophylline. We conducted a double-blind, placebo-controlled study of an inhaled single dose of tiotropium in 9 asthmatics currently smoking and 9 asthmatics who have never smoked in a crossover manner. Lung function was measured before and 1, 3, and 24 h after inhalation of 18 μg of tiotropium or a placebo.

Ototoxicity of acetic acid on the guinea pig cochlea.

Background: To evaluate the ototoxicity of acetic acid solutions.

Methods: Compound action potentials (CAPs) of the eighth nerve were measured in guinea pigs before and after the application of acetic acid in the middle ear cavity. The pH values of the acetic acid solutions were pH 3.

Ototoxicity of gentian violet on the guinea pig cochlea.

Purpose: Gentian violet (GV) is an antimicrobial and antifungal agent that has been used widely to treat intractable discharge in the ear. The purpose of this report is to warn clinicians about the ototoxic effect of GV in the middle ear.

Materials And Methods: GV ototoxicity was evaluated by measuring compound action potentials (CAPs) in the VIIIth nerve in adult Hartley guinea pigs.

Chronological changes in the eighth cranial nerve compound action potential (CAP) in experimental endolymphatic hydrops: the effects of altering the polarity of click sounds.

Conclusion: Using a guinea pig model of experimental endolymphatic hydrops, click sounds of altered polarity showed different latencies and amplitudes in hydropic compared with normal cochleae. Latency changes appeared as early as 1 week after endolymphatic obstruction. This method can help diagnose endolymphatic hydrops.

Colonoscopy in the diagnosis of intestinal tuberculosis in asymptomatic patients.

Background: Colonoscopy with terminal ileoscopy is crucial for the diagnosis of intestinal tuberculosis. This report describes characteristic endoscopic findings in patients with intestinal tuberculosis with few or no clinical symptoms.

Methods: Data for 11 consecutive patients in whom a diagnosis of intestinal tuberculosis was made during the last 15 years in one facility were reviewed.

A case of extrapleural empyema.

A 49-year-old man with diabetes mellitus and alcoholic liver cirrhosis presented with dyspnoea and fever. A chest computed tomography scan revealed three areas of loculated pleural effusion. Initially, the patient was thought to have an intrapleural empyema and was treated with intravenous antibiotics and closed drainage.

Disseminated intravascular coagulation associated with pulmonary tuberculosis.

Disseminated intravascular coagulation (DIC) is a very rare complication of pulmonary tuberculosis. We herein describe a case of cavitary tuberculosis complicated with DIC. Rifampin was considered to deteriorate the clinical course of DIC in this case.