Familial Idiopathic Interstitial Pneumonia Histopathology and Survival in 30 Patients
ABSTRACT Context.-Familial idiopathic interstitial pneumonia (F-IIP) describes the unexplained occurrence of diffuse parenchymal lung disease in related individuals. Prevailing wisdom suggests that the histopathology of F-IIP is indistinguishable from that of idiopathic pulmonary fibrosis, namely, usual interstitial pneumonia (UIP). Objective.-To define the histopathology of F-IIP in lung tissue samples. Design.-Tissue sections from 30 patients with F-IIP, enrolled in a national research program, were evaluated by 3 pulmonary pathologists using 15 predefined histopathologic features. Each feature was recorded independently before a final diagnosis was chosen from a limited list dichotomized between UIP or "not UIP." These 2 groups were then compared to survival. Results.-The consensus diagnosis for the F-IIP cohort was an unclassifiable parenchymal fibrosis (60%), with a high incidence of histopathologic honeycombing, fibroblast foci, and smooth muscle in fibrosis. Usual interstitial pneumonia, strictly defined, was identified in less than half of the F-IIP cases (range, 23%-50%). Interobserver agreement was fair (κ = 0.37) for 2 observers for the overall diagnosis of UIP. Findings unexpected in UIP were prevalent. The survival for the entire F-IIP cohort was poor, with an estimated mortality of 93% and a median age at death of 60.9 years. Subjects with UIP had a shorter survival and younger age at death. Conclusions.-Pulmonary fibrosis was the dominant histopathology identified in our patients, but diagnostic features of UIP were seen in less than 50% of the samples. Overall survival was poor, with mortality accelerated apparently by the presence of a UIP pattern of disease.
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ABSTRACT: A significant proportion of patients with autoimmune connective tissue disease (CTD) show lung involvement that results in clinical interstitial lung disease (ILD). Surgical lung biopsy is helpful for diagnosis of CTD-ILD in many cases. In this review, we discuss the histologic manifestations of different types of CTD-ILD, focusing on patterns of disease and their differential diagnoses. Acquired autoimmune connective tissue diseases will be covered in this review, while lung involvement in vasculitides, heritable connective tissue disorders, and drug-induced CTD-like conditions will not be discussed.Seminars in Respiratory and Critical Care Medicine 04/2014; 35(2):201-12. DOI:10.1055/s-0034-1371543 · 2.75 Impact Factor
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ABSTRACT: The purpose of this review is to provide an update on the diagnosis and classification of interstitial lung disease (ILD), with a specific focus on newly described ILD subtypes and phenotypes. In addition, the strengths and limitations of the current approach to ILD diagnosis and management are discussed. Idiopathic pleuroparenchymal fibroelastosis and acute fibrinous and organizing pneumonia are new entities that have been described in small case series. Undifferentiated connective tissue disease-associated ILD, smoking-related interstitial fibrosis, familial ILD, unclassifiable ILD, and subclinical ILD have also been better characterized in recent publications. New data regarding these conditions are summarized in this review. The multidisciplinary approach to ILD is reviewed, and complementary classification schemes are described that may help direct the management and improve prognostication of some ILDs. ILDs are a large and heterogeneous group of diseases with several newly characterized subtypes and phenotypes. The current approach to ILD classification has limitations in some patients that can be minimized by considering complementary classification schemes.Current opinion in pulmonary medicine 07/2013; DOI:10.1097/MCP.0b013e328363f48d · 2.96 Impact Factor
Article: Familial pulmonary fibrosis[Show abstract] [Hide abstract]
ABSTRACT: The occurrence of pulmonary fibrosis in numerous individuals from the same family suggests a genetic cause for the disease. During the last 10 years, mutations involving proteins from the telomerase complex and from the surfactant system have been identified in association with pulmonary fibrosis. Mutations of TERT, the coding gene for the telomerase reverse transcriptase, are the most frequently identified mutations and are present in 15% of cases of familial pulmonary fibrosis. Other mutations (TERC, surfactant proteins genes) are only rarely evidenced in adults. Patients with mutations involving the telomerase complex may present with pulmonary fibrosis, hematologic, cutaneous or liver diseases. Other genetic variations associated with pulmonary fibrosis such as a polymorphism in the promoter of MUC5B or a polymorphism in TERT have been recently described, and could be considered to be part of a polygenic transmission. Evidence for mutations associated with the development of pulmonary fibrosis raises numerous clinical questions from establishing a diagnosis, providing counselling to deciding on therapy, and requires specific studies. From a pathophysiological point of view, the function of the genes highlights the central role of alveolar epithelium and aging in fibrogenesis.Revue des Maladies Respiratoires 11/2014; DOI:10.1016/j.rmr.2014.07.017 · 0.49 Impact Factor