" /> Interstitial pneumonitis, desquamative, familial - CISMeF





Preferred Label : Interstitial pneumonitis, desquamative, familial;

Symbol : DIP;

CISMeF acronym : DIP;

Type : Phenotype or locus, molecular basis unknown;

Alternative titles and symbols : Interstitial lung disease, desquamative; Pneumonia, desquamative interstitial, familial; Pneumonitis, desquamative interstitial, familial; Ild, desquamative;

Description : Interstitial lung disease (ILD), or pneumonitis, is a heterogeneous group of disorders characterized pathologically by expansion of the interstitial compartment of the lung by inflammatory cells. Fibrosis occurs in many cases (Visscher and Myers, 2006). Desquamative interstitial pneumonitis (DIP) was originally described as a pathologic entity by Liebow et al. (1965). Lung biopsy shows diffuse and uniform filling of alveoli by clusters of cells which Liebow et al. (1965) speculated to be 'desquamated pneumocytes.' Since then, these cells have been shown primarily to be pigmented alveolar macrophages. Other features include thickened alveolar septa with an infiltrate of inflammatory cells and plump, cuboidal type II pneumocytes. Mild collagen deposition without architectural distortion or honeycombing may be present. Different forms of ILD represent pathologic classifications based on histologic patterns rather than clinical diagnoses and may occur in a variety of clinical contexts (Visscher and Myers, 2006). See also usual interstitial pneumonitis (UIP; see 178500), which is associated with pulmonary fibrosis. Although DIP occurs most often as a sporadic disorder in adults during the third to fifth decade of life and is highly associated with smoking (Carrington et al., 1978), reports of a familial form with onset in infancy and early death suggest a genetic basis (Sharief et al., 1994). Cases of DIP reported in infants are often more severe and refractory to treatment than those reported in adults (Nogee et al., 2001). With the advent of molecular genetic analysis, some cases of familial early-onset respiratory insufficiency associated with a pathologic diagnosis of DIP have been shown to result from congenital dysfunction of surfactant metabolism (see, e.g., SMDP1, 265120) due to mutations in genes involved in surfactant metabolism (Nogee et al., 2001; Whitsett and Weaver, 2002).;

Inheritance : Autosomal recessive;

Laboratory abnormalities : Hypoxia;

Prefixed ID : %263000;

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10/06/2024


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