1/89. A case of lung myelolipomatosis in a patient with bronchial carcinoid.Myelolipomas are very rare benign tumours composed of an admixture of mature adipose tissue and normal haematopoietic cells. Although they are most commonly found in the adrenal glands, extra-adrenal myelolipomas are documented. We described a case of myelolipoma arising in the lung in a 52-year-old man. The lesion was found incidentally in association with a carcinoid. To our knowledge, this is the second instance of this neoplasm presenting as a lung lesion, and the first case associated with bronchial carcinoid. Pathogenesis and aetiology of myelolipomas are referred to in this paper with special regard to the clinical and pathological findings.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
2/89. Amphicrine tumor.The term amphicrine refers to cells, and tumors, which show both exocrine and endocrine features. Author s aim was to analyse the characteristics of these neoplasms. 40 suspicious cases were reviewed. Mucin-stains (PAS, diastase-PAS, Stains-all, Alcian-blue), immunohistochemistry (antibodies against Neuron-Specific Enolase (NSE), and chromogranin a (CGA), and electronmicroscopic studies were performed to demonstrate exocrine and/or endocrine features of the tumor cells. By means of these methods, 16 cases turned out to be amphicrine tumors. Among them, there were 4 sinonasal, 1 bronchial, 1 mediastinal, 8 gastrointestinal and 2 suprarenal gland neoplasms. In connection to the subject, a brief review is given of amphicrine tumor, regarding its etiological and pathological aspects. These tumors form a distinct clinicopathological entity and should be separated from both neuroendocrine tumors and adenocarcinomas.- - - - - - - - - - ranking = 2keywords = neoplasm (Clic here for more details about this article) |
3/89. Malignant myxoid endobronchial tumour: a report of two cases with a unique histological pattern.AIMS: To present two cases of malignant endobronchial myxoid tumours with a highly distinctive sarcomatoid pattern not previously described at this site, and discuss their histogenesis in relation to previously documented endobronchial neoplasms. methods AND RESULTS: Both tumours presented in young adult females and were purely sarcomatoid with interweaving cords of small uniform, rounded or slightly elongated cells lying within a myxoid stroma. The stroma was alcian blue positive, but sensitive to hyaluronidase in both cases. The tumour cells contained a small volume of periodic acid-Schiff-positive eosinophilic cytoplasm and stained positively for vimentin only, but there also was a prominent background population of CD68-positive dendritic cells. Ultrastructural studies showed that the tumour cells contained an excess of rough endoplasmic reticulum, with some of the cisternae appearing dilated, and scalloping of the cell surfaces, although no intracisternal tubules were identified. CONCLUSIONS: Although the histological pattern was most reminiscent of extraskeletal myxoid chondrosarcoma, the sensitivity of the stroma to pretreatment with hyaluronidase precluded the diagnosis. However, there were similarities with the sarcomatoid component of malignant salivary gland-type mixed tumours of the lung and this tumour possibly represents a variant of a bronchial gland tumour. Despite this uncertainty over origin, this pattern should be recognized as part of the differential diagnosis of myxoid tumours in the lung, as an apparently indolent type of malignant endobronchial neoplasm.- - - - - - - - - - ranking = 2keywords = neoplasm (Clic here for more details about this article) |
4/89. Successful primary radiation therapy of adenoid cystic carcinoma of the lung.Adenoid cystic carcinoma is a distinctive malignant neoplasm generally arising from minor salivary glands, that arises infrequently as a primary tumor in the lung. Surgery has been considered the primary treatment, with radiotherapy generally utilized as adjuvant or palliative treatment. We report a patient in whom primary radiotherapy was sucessfully applied to treat adenoid cystic carcinoma involving the distal trachea, carina, and both main stem bronchi. A total dose of 66 Gy was delivered in 2-Gy fractions over a 7-week period. Clinically and histologically complete remission was achieved without evidence of disease during a 27-month follow up.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
5/89. Choroidal metastasis as the initial manifestation of a pigmented neuroendocrine tumor.We report the case of a 77-year-old woman in whom choroidal metastasis was the initial manifestation of a primary neoplasm presumed to be a pigmented pulmonary carcinoid tumor. The tumor initially was misdiagnosed cytologically and pathologically as a choroidal melanoma because it contained intrinsic melanin pigment. Positive immunoreactivity for cytokeratin, synaptophysin, chromogranin, and calcitonin and the presence of dense-core neurosecretory vesicles disclosed by electron microscopy established that the metastasis was a neuroendocrine tumor. Findings from systemic evaluation suggested that the primary tumor was located in the lung. The patient subsequently developed an intradural paraspinal metastasis, which also contained melanin pigment. The latter observation confirmed that the melanin in the uveal metastasis was intrinsic and did not represent secondary phagocytosis by tumor cells. Metastases from pigmented tumors of nonmelanocytic derivation are exceedingly rare but present a major diagnostic challenge to ocular pathologists and cytopathologists if the diagnosis is not suspected. Confirmatory immunohistochemical analysis should be obtained when a pigmented choroidal tumor thought to be a melanoma has atypical features. Arch Ophthalmol. 2000;118:841-845- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
6/89. Acute phlegmonous jejunitis and viridans streptococcal peritonitis associated with bronchial carcinoma.A 61-y-old man developed acute non-specific phlegmonous jejunitis associated with relatively mild diffuse peritonitis. Bacteriological cultures of the abundant peritoneal fluid resulted in only growth of viridans streptococci (streptococcus mitis and S. salivarius). Antibiotic treatment had a favourable effect, but a hitherto unknown bronchial cancer led to his death 5 months later. It is assumed that this peculiar case was the result of the immunosuppressive effect related to the malignant neoplasm (opportunistic infection).- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
7/89. Myoepithelial carcinoma of the lung arising from bronchial submucosa.Myoepithelial neoplasm mainly occurs in the salivary glands and breasts and is extremely rare in the lung. To our knowledge, this report describes the first documented case of a myoepithelial carcinoma present in the lung. The tumor derived from the right main bronchial submucosa and exhibited a dual epithelial and smooth muscular phenotype by immunohistochemical and ultrastructural studies. It invaded the neighboring pulmonary tissue and the hilar lymph nodes. Despite a right pneumonectomy and chemotherapy, metastasis was found in the left lung 7 months later.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
8/89. Membranous nephropathy resolving with treatment of bronchial carcinoid tumor.The nephrotic syndrome and membranous nephropathy is well recognized in association with solid tumors, although less is understood of the process that links them. We report a 27-year-old man presenting with the nephrotic syndrome and stage I membranous glomerulonephritis on biopsy. A bilar mass with regional lymphadenopathy was found simultaneously, the histology of which was shown to be an infiltrative atypical bronchial carcinoid tumor. The neoplasm was successfully treated with combined chemotherapy and radiotherapy, and over this period his nephrotic-range proteinuria resolved. As has been described with other malignancies, membranous nephropathy associated with a bronchial carcinoid tumor may resolve with treatment of the underlying condition.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
9/89. granular cell tumor of the bronchus.Persistent atelectasis and recurrent pneumonia in the same location should raise suspicion of congenital anomalies or obstructing lesions of the bronchus leading to the affected area. We present an 8-year-old black female with a history of recurrent fever, cough, atelectasis of the right middle and lower lobes, and weight loss for several months. Flexible bronchoscopy revealed a polypoid mass obstructing the bronchus intermedius. biopsy of the neoplasm demonstrated a granular cell tumor (GCT). The patient had a lobectomy of the right lower and middle lobes. She had no recurrence of the tumor after several years of follow-up.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
10/89. Bronchial oncocytoma.CONTEXT: Oncocytomas are generally small and present slow growth. Finding of the tumor usually occurs incidentally. Their incidence is higher among male patients. Oncocytomas in mucous bronchial glands are extremely rare. CASE REPORT: A 35-year-old male who presented bronchial oncocytoma. The tumor was found after bronchoscopy that investigated an atelectasis of the upper left lobe. Histological examination with optical microscopy revealed a mature neoplasm formed by ovoid cells with thin, granular, eosinophilic cytoplasm and small nuclei similar to oncocytes. Electron microscopy showed mitochondrial hyperplasia. A three-year follow-up after thoracotomy followed by lobectomy and removal of the bronchial tumor was uneventful.- - - - - - - - - - ranking = 1keywords = neoplasm (Clic here for more details about this article) |
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