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Query: UMLS:C0684249 (lung carcinoma)
 23,830 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A case of lymphoepithelioma-like carcinoma of the lung is reported in a Chinese patient with serologic evidence of previous Epstein-Barr (EBV) infection. EBV genomes were detected in the tumor using polymerase chain reaction (PCR) and in situ hybridization (ISH) from formalin-fixed, paraffin-embedded tissue blocks. The use of both techniques afforded the exquisite sensitivity of PCR to detect a few copies of EBV DNA with the ability of ISH to precisely localize EBV to the carcinoma, but not to the lymphoid stroma. These findings support a potential oncogenic relationship between EBV and lymphoepithelioma-like carcinoma of the lung.
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PMID:Detection of Epstein-Barr virus in lymphoepithelioma-like carcinoma of the lung. 164 59

Historically lymphoepithelioma was a term used to describe an undifferentiated mucosal carcinoma with a lymphocytic component arising only from the nasopharynx, although recently, lymphoepithelioma-like carcinoma has been found to occur as a primary tumor of the lung. Thus far, five patients have been documented as having this rare anatomical presentation. The patient that is being presented is the latest case of lymphoepithelioma-like carcinoma of the lung and will be compared clinically and histologically with the other four cases. The case is presented in order to discuss optimal methods of diagnoses and treatment for this condition.
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PMID:Lymphoepithelioma-like carcinoma of the lung. 189 Aug 41

A rare case of squamous carcinoma of the thymus is described and the literature is reviewed. This type of thymic carcinoma is surgically curable even in the presence of local invasion. It also appears radiosensitive with apparent cure by radiotherapy alone observed. Its prognosis is better than squamous carcinoma of the lung with mediastinal involvement, and lymphoepithelioma-like thymic carcinoma.
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PMID:Squamous carcinoma of the thymus. 669 95

Lymphoepithelioma-like carcinoma is a non-nasopharyngeal undifferentiated carcinoma with prominent lymphoid infiltration. Ten cases arising in the lung have been reported so far; seven cases were diagnosed in Orientals, with the Epstein-Barr virus (EBV) genome demonstrated in neoplastic cells by in situ hybridization; the remaining three cases affected Caucasian patients and showed no evidence of hybridized viral genome. The present study describes two additional cases of lymphoepithelioma-like carcinoma of the lung in Caucasians, with reference to the differential diagnosis versus other thoracomediastinal malignancies. The neoplastic nuclei, blast-like in appearance, together with the immunohistochemical profile of the neoplastic cells (positivity for cytokeratins, and negativity for CD antigens, S100 protein, placental alkaline phosphatase, and neuroendocrine markers) represent the basic pathologic features of a lymphoepithelioma-like carcinoma and allow its recognition even on small bioptic fragments, in which the typical biphasic, Regaud-like morphology might be inapparent. In accordance with the previously reported cases of pulmonary lymphoepithelioma-like carcinoma in Caucasian patients, the present study found no evidence of the Epstein-Barr virus genome in neoplastic cells with in situ hybridization.
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PMID:Lymphoepithelioma-like carcinoma of the lung. Two cases diagnosed in Caucasian patients. 777 19

Epstein-Barr virus (EBV) is strongly associated with nasopharyngeal carcinoma and lymphoepithelioma-like carcinomas (LELC) of foregut-derived organs. Recently this group of EBV-associated carcinomas has been expanded by the identification of the virus in conventional adenocarcinomas of the stomach. In situ hybridization (ISH) using a sensitive digoxigenin-labelled EBER RNA probe was performed on 167 consecutive unselected primary non-small cell lung carcinomas, to determine the frequency of EBV association in these tumours. Nine cases (5.4 per cent) showed strong EBER signals in the tumour cell nuclei. By immunohistochemistry, four of the EBER-positive tumours showed patchy expression of the viral latent membrane protein (LMP-1) and none showed any expression of the EBV nuclear antigen 2 (EBNA2). Morphologically, all the positive tumours were LELC, whereas no conventional type of non-small cell lung carcinoma showed EBV association. The LELC presented a morphological spectrum from undifferentiated to squamoid or glandular differentiation. The patients showed a male to female ratio of 8:1. The mean age at presentation was 48 years. Smoking was not a risk factor. All patients were alive at follow-up periods of 23-52 months. Southern blot analysis performed on eight of the nine positive tumours showed a clonal episomal form of EBV, suggesting the clonal expansion of an infected tumour cell early in oncogenesis. These characteristics of the EBV-associated lung tumours justify their consideration as a distinct clinicopathological entity.
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PMID:In situ detection of Epstein-Barr virus in non-small cell lung carcinomas. 855 84

A 47-year-old Caucasian female was admitted to the hospital with a suspicious lesion in the right lower lobe of the lung. At frozen tissue sections a malignant tumour was found which, after special stains and immunohistochemical investigations, was diagnosed as lymphoepithelioma-like carcinoma. Non-Hodgkin's lymphoma and metastasis of a nasopharygeal carcinoma could be excluded by immunohistochemical stains and clinical examination. The tumour cells and the infiltrating lymphocytes were negative for Epstein-Barr virus (EBV) as revealed by in situ hybridization (ISH) and polymerase chain reaction (PCR). A reevaluation of the literature showed an interesting and surprising fact: in all lung cases, so far reported, the tumour cells were positive for EBV in Asians and negative in Caucasians. Due to the high prevalence of EBV infections in the Asian population it might be speculated, that EBV positivity could be an epiphenomenon in Asian cases of lymphoepithelioma-like carcinoma of the lung.
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PMID:Lymphoepithelioma-like carcinoma of the lung. 882 23

Having observed 2 cases of lymphoepithelioma-like carcinoma of the lung in a 49-year-old female and in a 66-year-old male patient, we present a review on this entity, which was described for the first time in 1987. Essentially this neoplasm has the same histological appearance as a Schmincke-Regaud tumor, but it is possible that a certain morphological variety exists. In the differential diagnosis, a metastasis of a Schmincke-Regaud tumor and a malignant lymphoma should be considered. Including our 2 cases, a total of 30 cases have been reported: 14 male patients aged between 33 and 73 years and 12 female patients between 38 and 70 years; in 4 cases there was no reference to sex or age. Most of the patients were Asians, mainly Chinese. These tumors presented with nearly the same frequency in both lungs. They mostly appeared as peripheral coin lesions in the chest X-ray study. Lymph node metastases were found in approximately 25% of the cases. Hematogenous metastases seldom occurred and were observed almost only in the skeletal system. In most cases a lobectomy was performed. At present, no exact assertion is possible regarding the prognosis. An association with an Epstein-Barr virus infection was observed in the Asian patients, but not in the Caucasian patients.
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PMID:[Lymphoepithelioma-like lung carcinomas]. 924 73

Primary lymphoepithelioma-like carcinoma of the lung is rare; only 26 case reports have been identified in the literature. The present report presents a case of a 67-year-old white man with a T1 N1 M0 lymphoepithelioma-like carcinoma of the lung. He presented with severe arthritic complaints that resolved after resection of the tumor. The majority of these tumors have occurred in Asian patients who have shown evidence of previous exposure to the Epstein-Barr virus.
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PMID:Lymphoepithelioma-like carcinoma of the lung. 935 48

Lymphoepithelioma-like carcinoma (LELC) of the lung is a recently recognized primary non-small cell lung carcinoma with distinct clinicopathological features and an aetiological association with Epstein-Barr virus (EBV) infection. The tumour consists of clusters and sheets of poorly or undifferentiated tumour cells in close association with numerous mononuclear inflammatory cells, including a rich component of tumour-associated macrophages (TAMs). To investigate the molecular mechanism leading to the TAM-rich stroma, the expression of a monocyte-specific chemotactic and activating factor, monocyte chemoattractant protein-1 (MCP-1), was studied by reverse transcriptase-polymerase chain reaction (RT-PCR) and in situ hybridization (ISH), and the presence of TAMs was demonstrated by immunohistochemistry in nine LELCs. The results were compared with those found in 17 conventional non-small cell lung carcinomas. RT-PCR showed specific MCP-1 amplification in both LELCs and non-LELCs, but ISH demonstrated a unique and extensive expression of MCP-1 transcripts by the tumour cells of LELCs only, while TAMs, stromal fibroblasts, and endothelial cells formed the major source of MCP-1 in non-LELCs. TAMs in LELCs were more abundant and showed a close topographical relationship with the MCP-1-expressing tumour cells. The results indicate that tumour cell expression of MCP-1 in LELCs is an important mechanism contributing to their distinctive morphological features. This is the first study that demonstrates the in vivo upregulation of a monocyte-specific chemokine by EBV-related carcinomas, illustrating an interesting aspect of tumour biology in EBV-related neoplasms.
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PMID:Monocyte chemoattractant protein-1 (MCP-1) expression in primary lymphoepithelioma-like carcinomas (LELCs) of the lung. 1020 85

Lymphoepithelioma-like carcinoma of the lung was diagnosed in a 39-year-old Chinese woman. In situ hybridization of Epstein Barr virus-encoded small nuclear RNA 1 (EBER 1) detected strong EBER 1 signals in the nuclei of tumor cell specimens from the patient. After polymerase chain reaction (PCR) amplification, electrophoresis identified the IR-1 region in this tumor as a positive sharp band, closely resembling Raji cells (Burkitt's cell line). The uniform and intense presence of EBER 1 in the tumor nuclei and the PCR products of EBV DNA in the tumor demonstrated that a high copy number of EB virus genome existed in the tumor, and indicated involvement of the EB virus in the pathogenesis of lymphoepithelioma-like carcinoma of the lung.
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PMID:[Lymphoepithelioma-like carcinoma of the lung]. 1048 64


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