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Neuroendocrine tumors of the lung embrace a spectrum from low-grade typical carcinoid (TC), intermediate-grade atypical carcinoid (AC), and high-grade categories of large cell neuroendocrine carcinoma (LCNEC) and small cell carcinoma (SCLC). We studied 200 neuroendocrine lung tumors to critically evaluate the Arrigoni histologic criteria for AC using(More)
AIMS Extra-adrenal paragliomas are neoplasms which have been the subject of much debate regarding parameters to establish their biological behaviour. This study describes the clinicopathological and immunohistochemical features of 30 cases of spinal paragliomas. METHODS AND RESULTS There were 15 male and 15 female patients. The median age at diagnosis was(More)
Alveolar adenoma of lung is a rare benign neoplasm of uncertain histogenesis. Its rarity hampers characterization of its epithelial and mesenchymal elements. Clinical and histopathologic features of 17 alveolar adenomas were reviewed. Histochemistry was performed on 10 cases, ultrastructural analysis on two, and immunohistochemistry on six cases for(More)
BACKGROUND Primary intrapulmonary meningiomas are rare, and their occurrence has been reported in the literature only sporadically. METHODS The clinical, pathologic, and immunohistochemical features of ten cases of primary intrapulmonary meningioma were reviewed. RESULTS The patients were 4 women and 6 men between the ages of 30 and 72 years (mean age:(More)
Six malignant tumors of the lung with a rhabdoid phenotype are described. All presented as lung masses in middle-aged to elderly adults (mean age 51 years), with no sex predilection. The tumors ranged from 1.3 cm to 8.0 cm in size and were generally associated with locally advanced disease. The distinctive (and defining) histologic feature was the presence(More)
Nodular lymphoid hyperplasia is a controversial entity in which its existence in the lung has been doubted. The current opinion is that most, if not all, such cases represent extranodal marginal zone B-cell lymphomas masquerading as reactive lesions. We found 14 cases of nodular lymphoid hyperplasia in the files of the Pulmonary Department at the Armed(More)
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