Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0684249 (lung carcinoma)
 23,830 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The presentation of tuberculosis is variable depending on the severity of the infection, the age of the patient, whether the infection is primary or secondary, and whether the manifestations are due to inhalation of organisms or hematogenous dissemination. A definitive diagnosis is made by culture of the organism; spontaneously expectorated sputum is the most suitable specimen for diagnosing pulmonary tuberculosis. Diagnosis of extrapulmonary tuberculosis frequently requires tissue biopsy. The classic staining method for demonstrating tubercle bacilli is the Ziehl-Neelsen technique. Newer methods based on fluorescent dyes and phase-contract microscopy make rapid screening feasible, but false-positive identification is more frequent. Culture of tubercle bacilli is most successful when two media are used. The differential diagnosis of pulmonary tuberculosis includes bacterial pneumonia, especially anaerobic infection, and fungal infections including histoplasmosis, coccidioidomycosis, and blastomycosis. Lung carcinoma can mimic tuberculosis and the two diseases can coexist. Surgery is frequently necessary for a definitive diagnosis, expecially when the disease is seen as a noncalcified nodule.
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PMID:Tuberculosis. Clinical aspects and diagnosis. 9 19

One case of chronic histoplasmosis of the lung and intrathoracic lymph nodes with subsequent generalization of the disease resulting in the death from the intoxication is described. Clinically, the diagnosis of lung carcinoma was established.
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PMID:[Histoplasmosis of the lungs]. 233 97

We report two cases of small pleural nodules showing the distinctive histologic appearance of adenomatoid tumor. Both lesions were discovered incidentally during surgery in patients undergoing lung resection for unrelated intrapulmonary masses: lung carcinoma in one case and histoplasmosis in the other. The tumors were composed of a focal proliferation of epithelioid cells forming vacuoles and tubular spaces in a fibrous stroma, as seen in adenomatoid tumors from other sites. The differential diagnosis in both cases included metastatic signet ring cell carcinoma. The mesothelial nature of the lesions was supported by immunohistochemical and ultrastructural evidence. The tumor cells in both cases were positive for cytokeratin but negative for carcinoembryonic antigen and LeuM1. One case was also negative for BER-EP4, B72.3, CD34, and Factor VIII. Electron microscopy in this case demonstrated well-developed basal laminae, desmosomes, and numerous slender microvilli along the luminal surfaces of the tumor cells. Adenomatoid tumors are regarded as a benign variant of mesothelioma. Despite the abundance of mesothelial cells in the pleura, adenomatoid tumors are apparently extremely rare in this location. Separation from malignant lesions such as adenocarcinoma and epithelioid hemangioendothelioma is important.
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PMID:Adenomatoid tumors of the pleura. 882 28