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Query: UMLS:C0032285 (pneumonia)
 54,520 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A four year old boy with a clinical picture of acute pneumonia is presented. Antibiotic therapeutic improved the clinical and analytic symptomatology but a round, radiologic shadow persisted after three months of evolution. Thoracotomy was performed and by histopathologic examination histiocytoma of lung diagnosed. Literature is reviewed and the clinical, radiologic, pathologic and etiopathogenetic features are commented. These lesions should be considered as benign to avoid extensive resection.
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PMID:[Inflammatory pseudotumor of the lung in infancy (histiocytoma) (author's transl)]. 17 61

Intratracheal tumors are rare in children. A case is reported of a two-year-old female child with a fibrous histiocytoma of the trachea which caused severe respiratory obstruction and persistent right middle lobe pneumonia. Fibrous histiocytomas are basically benign tumors of histiocytes and have been mistaken for other tumors such as fibroma, sclerosing hemangioma, neurilemoma, fibromatosis, hemangiopericytoma, fibrosarcoma, and some primitive sarcomas. Fibrous histiocytomas have not been reported in the trachea or bronchi. The patient was treated with endoscopic removal of the tumor, and has remained free of disease to this date.
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PMID:Fibrous histiocytoma of the trachea. 21 68

A case of benign fibrous histiocytoma of the lung in a 8 years old boy was presented. He was first admitted in May, 1983, with recurrent pneumonia. Chest X-ray showed a ill-defined mass in the right lower lobe. Bronchoscopy revealed a round tumor, 1 cm. in maximum diameter, with complete obstruction of the Truncus Intermedius. Endoscopic resection was performed and partial obstruction of the Truncus Intermedius remained. He was re-admitted with pneumonia of the right middle lobe in March, 1986. Bronchoscopy showed severe stenosis of the Truncus Intermedius. Right middle and lower lobectomy was performed. The 4 X 4 X 3 cm tumor was located in the median of the Truncus Intermedius. Microscopically, the lesion composed of fibroblast-like cells and histiocyte-like cells. The patient's post-operative course was uneventful. He has no signs of local recurrence or metastasis. We believe, this is the first reported primary benign fibrous histiocytoma of the lung in a child in Japan.
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PMID:[A case of benign fibrous histiocytoma of the lung in a child]. 254 28

Clinicopathologic findings in 32 cases of inflammatory pseudotumor of the lung are described. Depending on the major histopathologic features, the cases are divided into three groups: Organizing pneumonia type (44%), fibrous histiocytoma type (44%), and lymphoplasmacytic type (12%). Organizing pneumonia type has intraalveolar lymphohistiocytic inflammation which converts to intraalveolar fibrosis peripherally and interstitial fibrosis centrally because of a proliferation of fibroblasts. Fibrous histiocytoma type has a predominant proliferation of spindle cells and histiocytes in storiform pattern, with loss of alveolar architecture. Lymphoplasmacytic type has a predominance of lymphocytes and plasma cells with little fibrosis. There is considerable histologic overlap among the three types. All cases have regions of organizing pneumonia. Most or all cases of inflammatory pseudotumor are believed to originate as organizing pneumonia.
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PMID:Inflammatory pseudotumors of the lung: progression from organizing pneumonia to fibrous histiocytoma or to plasma cell granuloma in 32 cases. 284 Dec 19

Inflammatory pseudotumors of the liver are extremely rare. Worldwide only 50 cases have been described so far. In lung tissue, their incidence is higher, with 119 cases being published. Etiological factors are still a matter of debate; reactive inflammatory processes have recently been proved by immunohistological and cytophotometric studies. This seems to be true for both liver and lung locations of inflammatory pseudotumors. Considerable morphological heterogeneities, conspicuously varying from one case to another, reflect the numerous synonyms that have been created for this condition, i.e., plasma cell granuloma, xanthoma, fibroxanthoma, histiocytoma, plasmacytoma, solitary "mast cell tumor" and pseudoneoplastic pneumonia, just to number a few of them. This multicolored morphology explains the difficulties in histologic diagnosis, especially if needle biopsies or frozen sections are submitted to pathology. Differential diagnosis of an inflammatory pseudotumor of the liver needs to include fibrohistiocytic neoplasia if spindle-cell-shaped areas are included or, on the other hand, parenchymal infiltrates of the nodular sclerosing type of Hodgkin's granuloma. Immunohistological investigations do not allow final decisions since spindle-shaped cells within pseudotumours can express vimentin and/or desmin as well. Such histological cases should always include the excision of a piece of liver tissue of sufficient size to comfortably allow for the recognition of the multicellular composition and morphological heterogeneity of this process.
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PMID:[Inflammatory pseudotumor of the liver. Morphologic and cytophotometry studies and differential diagnosis]. 857 May 61

Inflammatory pseudotumor (also called plasma cell granuloma, histiocytoma and x-anthofibroma) is a benign, slow growing lesion which may present with cough, dyspnea, hemoptysis and unresolving pneumonia or can be discovered radiographically as a localised lesion. It has been reported in individuals up to 70 years old, but approximately two-thirds have developed in individuals under 30 years of age. The sex incidence is approximately equal. Inflammatory pseudotumors of the lung are usually peripheral lesions but may occasionally be endobronchial. We report the case of an endobronchial inflammatory pseudotumor in a 17-year-old girl who presented with unresolving right-sided pneumonia. Appropriate radiological, bronchoscopic and histopathological investigations lead to accurate pre-operative diagnosis and early complete surgical resection through a limited right main bronchus incision (bronchotomy). The patient made good postoperative recovery and an excellent prognosis is anticipated.
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PMID:Endobronchial inflammatory pseudotumor of the lung. 1133 98

The objective of this study was to describe the computed tomographic (CT) features of myofibroblastic inflammatory tumor of the lung with histopathologic correlation. The medical records and imaging studies of eight patients with pathologically proven myofibroblastic inflammatory tumor of the lung were reviewed. On radiographs and CT images, a poorly circumscribed mass or nodule was evident in five patients (six lesions), and a well-circumscribed lesion was evident in three patients (three lesions). Seven lesions were peripheral and two were centrally located. At CT, five lesions were of heterogeneous attenuation and four homogeneous. Increased perilesional parenchymal abnormalities, which were caused by peribronchial inflammatory infiltrates, were observed in three cases. The predominant histopathologic feature was organizing pneumonia type in three cases, lymphoplasmacytic type in three cases, and both organizing pneumonia and lymphoplasmacytic type in two cases. Variable degree of fibrous histiocytoma type was observed in all cases. The imaging characteristics of myofibroblastic inflammatory tumor of the lung are variable and nonspecific. The authors conclude that most cases appear as solitary, peripheral lesions with a predilection for the lower lobes. Associated findings may include perilesional inflammatory changes. Because myofibroblastic inflammatory tumor cannot be reliably differentiated from other pulmonary lesions based solely on the imaging appearance diagnostic biopsy is mandatory. Interpretation of the imaging findings combined with the histopathologic features of disease may help make correct diagnosis.
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PMID:Myofibroblastic inflammatory tumor of the lung: CT findings with pathologic correlation. 1771 2

The emerging novel human betacoronavirus 2c EMC/2012 (HCoV-EMC) was recently isolated from patients with severe pneumonia and renal failure and was associated with an unexplained high crude fatality rate of 56%. We performed a cell line susceptibility study with 28 cell lines. HCoV-EMC was found to infect the human respiratory tract (polarized airway epithelium cell line Calu-3, embryonic fibroblast cell line HFL, and lung adenocarcinoma cell line A549), kidney (embryonic kidney cell line HEK), intestinal tract (colorectal adenocarcinoma cell line Caco-2), liver cells (hepatocellular carcinoma cell line Huh-7), and histiocytes (malignant histiocytoma cell line His-1), as evident by detection of high or increasing viral load in culture supernatants, detection of viral nucleoprotein expression by immunostaining, and/or detection of cytopathic effects. Although an infected human neuronal cell line (NT2) and infected monocyte and T lymphocyte cell lines (THP-1, U937, and H9) had increased viral loads, their relatively lower viral production corroborated with absent nucleoprotein expression and cytopathic effects. This range of human tissue tropism is broader than that for all other HCoVs, including SARS coronavirus, HCoV-OC43, HCoV-HKU1, HCoV-229E, and HCoV-NL63, which may explain the high mortality associated with this disease. A recent cell line susceptibility study showed that HCoV-EMC can infect primate, porcine, and bat cells and therefore may jump interspecies barriers. We found that HCoV-EMC can also infect civet lung fibroblast and rabbit kidney cell lines. These findings have important implications for the diagnosis, pathogenesis, and transmission of HCoV-EMC.
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PMID:Differential cell line susceptibility to the emerging novel human betacoronavirus 2c EMC/2012: implications for disease pathogenesis and clinical manifestation. 2387 23