Cases reported "Lung Neoplasms"

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11/49. carcinoid tumor of the lung presenting as a pleural mass: CT diagnosis.

    Carcinoid tumors of the lung typically arise centrally within the tracheobronchial tree. We report a rare case of a carcinoid tumor presenting as a pleural mass. The classification and X-ray features are described.
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12/49. Atelectasis of the right medial basal segment mimicking primary lung cancer in an asthmatic patient.

    A segmental collapse due to mucous plug in the bronchus tree may mimic malignant pathological conditions. We present a case of 58-year-old asthmatic patient with an obstruction of right medial basal bronchus due to mucous plug, which was simulating mediastinal mass. To the best knowledge, a similar case is not reported in the English medical literature.
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13/49. Diagnostic value of bronchoscopy, CT and transbronchial biopsies in diffuse pulmonary lymphangiomatosis: case report and review of the literature.

    The authors present the case of a 48-year-old man with diffuse pulmonary lymphangiomatosis. This rare lymphatic disorder is characterized by proliferation of anastomosing lymphatic vessels varying in size. Clinical presentation and imaging findings are highly suggestive. Bronchoscopic examination of this patient showed, for the first time to our knowledge, vesicles disseminated throughout the bronchial tree. Histopathological examinations are necessary to differentiate lymphangiomatosis from lymphangiectasis. The diagnosis can be made by transbronchial biopsy without performing open lung biopsy which was, until now, considered necessary for diagnosis.
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14/49. bronchiectasis simulating pulmonary metastases on iodine-131 scintigraphy in well-differentiated thyroid carcinoma.

    Differentiated thyroid cancer is an uncommon disease that carries a good prognosis when treated adequately. Radioiodine treatment is often used as an adjunct to surgery because this has been associated with increased survival, particularly in the presence of iodine-avid soft tissue metastases. Multiple different false-positive scans can occur in the absence of residual thyroid tissue or metastases. Recognition of these potential false-positive iodine-131 (I-131) scans is critical to avoid the unnecessary exposure to further radiation from repeated therapeutic doses of radioactive iodine. We report a case of physiological uptake of radioactive iodine in the bronchiectatic bronchial tree bilaterally, potentially masquerading as pulmonary metastases.
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15/49. Virtual bronchoscopy for diagnosis of recurrent respiratory papillomatosis.

    Virtual bronchoscopy is a new method for viewing helical/spiral computed tomography (CT) images of the tracheobronchial trees. Using commercially available software to process the CT data, the tracheobronchial trees can be inspected through a series of three-dimensional images. Recently, this technique has been increasingly used to detect benign and malignant airway stenosis. We report the findings of virtual bronchoscopy in a 41-year-old man with recurrent respiratory papillomatosis (RRP). Several tiny nodules were evident in the lower trachea. Fiberoptic bronchoscopy was performed 1 month later during a planned surgery for laryngeal papillomas, and the findings were in agreement with virtual bronchoscopy. Detection of intrabronchial spreading in RRP is important since peripheral seeding of RRP can cause complications, including recurrent pneumonia, obstructive atelectasis, hemoptysis, and, rarely, may degenerate to squamous cell carcinoma. Virtual bronchoscopy is an alternative method for inspecting the tracheobronchial trees in patients with RRP when laryngeal papillomas impede fiberoptic bronchoscopy.
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16/49. An unusual case of thymic carcinoma with endobronchial metastases manifesting as centrilobular opacities.

    We report a case of a 75-year-old man having unusual manifestation of thymic carcinoma associated with endobronchial metastases. To our knowledge, endobronchial metastases secondary to thymic carcinoma has not been reported in the literature. On high-resolution computed tomograms, the tree-in-bud centrilobular opacities caused by metastatic cells accumulating within the small bronchioles is indistinguishable from that caused by inflammatory process. Thus, in patients with thymic carcinoma and persistent tree-in-bud centrilobular opacities, endobronchial metastatic disease should be considered.
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17/49. Foreign body removal: a new role for the fiberoptic bronchoscope.

    Artificial and animal lung models initially were used to investigate the removal of foreign bodies from the tracheobronchial tree with the flexible fiberoptic bronchoscope. Different extraction instruments (claw, basket, forceps, and balloon catheter) were passed separately through the channel of the bronchofiberscope, and tested for usefulness prior to human application. The Fogarty balloon catheter served as a valuable aid in dislodging impacted objects so that the operator could then grasp them with the claw, basket or forceps. The wire claw recovered many of the metallic and organic objects, the wire basket was successful in retrieving only the bulky objects and the forceps (ACMI) was effective in capturing all of the metallic foreign bodies. These techniques, developed in our laboratory, are now being used to augment rigid bronchoscopy in the removal of foreign bodies from adults and older children. At the present time fiberoptic foreign body removal is not recommended for pediatric cases because of the small diameter of the trachea and glottis in infants and young children.
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18/49. Peripheral mucoepidermoid tumour of the lung.

    Mucoepidermoid tumours of the bronchial tree are uncommon neoplasms, which are believed to arise from terminal ducts of the proximal tracheobronchial tree. The first case of a peripheral mucoepidermoid tumour of the lung is reported.
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19/49. The histogenesis and development of pulmonary tumorlets.

    A lung, which was surgically removed from a patient who had oat cell carcinoma, contained multiple tumorlets and showed extensive Kultschitsky-type cell proliferation of bronchial and bronchiolar mucosa. On the basis of light and electron microscopic observations, it is shown that pulmonary tumorlets arise from focal areas of bronchial and bronchiolar Kultschitsky cell proliferation which may advance to luminal obliteration. Involvement of the pulmonary parenchyma takes place by extension of these newly proliferated cells along the terminal branches of the bronchiolar tree or by penetration of the bronchial or bronchiolar wall; the latter process evokes a striking proliferation of connective tissue which forms the matrix in which the cells of some fully developed tumorlets are embedded. Because of striking morphologic similarities between tumorlets and spindle cell carcinoid tumors, and the proven origin of tumorlets from pulmonary Kultschitsky-type cells, it is suggested that the more complete and histogenetically acceptable term "carcinoid tumor-let" be used to distinguish this lesion from other forms of epithelial proliferations in the lung.
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20/49. Primary pulmonary hemangiopericytoma: early local recurrence after perioperative rupture of the giant tumor mass (two cases).

    We report two recent observations of giant hemangiopericytoma of the lung, one in a 4-year-old child and another in a 65-year-old man. There were no specific clinical signs, but the radiologic appearance was rather characteristic in both cases, as were the histologic findings. pneumonectomy was carried out, complicated in each case by rupture of the fragile, incomplete pseudocapsule and diffuse dissemination of necrotic tumor tissue in the operative field and opposite bronchial tree. Outcome was fatal in both cases within a few months, with extensive, rapidly growing metastases in the subcutaneous scar tissue of the thoracotomy and in the other lung and in one case with diffuse diaphragmatic and intraabdominal metastases. These two observations will offer some guidelines for better understanding of this rare localization of hemangiopericytoma, its natural history, and its optimal treatment, with special reference to the malignant potential and local recurrence rate.
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