Lung hamartomas in Alexandra
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Abstract:
Background: Lung hamartomas are rare tumours with compressive effects on lung parenchyma and bronchi. This is a report of our experience in the management of this condition.Methods: We retrospectively studied the records of patients with lung hamartomas managed at Alexandria University Hospital between 2001 and 2007. Information on presentation, treatment and outcome were obtained.Results: Five patients aged 35.6+14.4 years had lung hamartoma. Two patients were asymptomatic, 2 had cough and 1 presented with haemoptysis. Pre-operative diagnosis was lung carcinoma in 4 patients. Four patients had lobectomy while 1 had wedge resection. Histology confirmed fibrochondromatous hamartomas in all patients.Conclusion: Lung hamartomas should be a consideration in solitary coin lesions.Keywords: Lung hamartomas, benign tumours, lung carcinoma.Keywords:
Hamartoma
Wedge resection
Parenchyma
Left lung
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Leaflets of Vicia faba were pulse-labeled with 14CO2 to follow the subsequent movement of photosynthate between leaf tissues. Samples were taken during a 12CO2 chase, quick frozen, freeze-substituted, and embedded in methacrylate. Paradermal sections provided tissue samples consisting only of upper epidermis, palisade parenchyma, spongy parenchyma and veins, spongy parenchyma, or lower epidermis. Most CO2 fixation occurred in the palisade parenchyma, but its 14C content declined rapidly after labeling. Concomitant with the decline of activity in the palisade parenchyma, there was an increase in activity in the spongy parenchyma and upper epidermis and a slow increase in the lower epidermis. Activity in the palisade parenchyma and spongy parenchyma eventually reached similar levels and remained constant. Tissue samples containing veins were consistently the most radioactive, and activity in those samples showed a decline. Very little change occurred in the insoluble fraction from any tissue. The results support previous assumptions regarding the pathway of assimilate transport to the veins, and demonstrate the rapidity of such transport. Sucrose is apparently the principal mobile compound.
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Epidermis (zoology)
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The bamboo, woody monocot, has two types of parenchyma cells in the ground tissues of its culm, in contrast to a single type of parenchyma cell in rice, maize and other major crop species. The distribution of cell wall components, including lignin, (1→3), (1→4)-β-d-glucans (MGs), the highly-substituted glucuronoarabinoxylans (hsGAXs) and low-branched xylans (lbXs) in ground parenchyma tissue of Phyllostachys heterocycla var. pubescens culms was studied at various developmental stages using light microscopy (LM), UV-microscopy, transmission electron microscopy (TEM) and immunolabeling techniques. The short parenchyma cell walls were lignified in 2-month-old bamboo culms just as the long parenchyma cell walls were. The lignified regions were confined to the portions in contact with the long parenchyma cell walls, while the walls at the cell corner region never lignified, even in 7-year-old culms. Significant differences were also found in the hemicellulose distribution between the short and long parenchyma cell walls. In bamboo parenchyma tissue, MGs were localized in short parenchyma cell walls and few were found in long parenchyma cell walls in both young and 7-year-old culms. The distribution of hsGAXs was similar to that of MGs in young culms, but they only appeared in the cell corner region of short parenchyma cells in old culms. Low-branched xylans were distributed in the lignified, but not in unlignified parenchyma cell walls. Based on this evidence, the differences of function in both short and long parenchyma cells in a bamboo culm are discussed.
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Wedge resection
Left lung
Wedge (geometry)
Lobe
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Background
Pulmonary hamartoma is a benign tumor composed of cells and tissues, amorphous demarcated. It occurs in 0.25% of the general population (in autopsy material) and in 6-8% of all benign solitary lung nodules.
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Left lung
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In order to study the accumulation of collagen during postnatal development in the major structures of the lung, trachea, bronchi, pulmonary vasculature, and parenchyma were isolated from the lungs of 1-week, 2-month, and 6-month-old rabbits. The concentrations of DNA, protein, and collagen in parenchyma were similar to those for whole lung. DNA per dry weight for all structures declined with age. The DNA concentration of trachea at 6 months was only one-tenth that of parenchyma. Protein per dry weight was constant in parenchyma but dropped by half in trachea and nearly that in bronchi. Collagen per dry weight increased significantly between 1 week and 6 months in all structures. The collagen concentrations in vessels, bronchi, and trachea are similar to each other and three to five times that of parenchyma. The total amount of collagen in bronchi, trachea and parenchyma increased approximately 12-, 50-, and 90-fold, respectively, between 1 week and 6 months of age.
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Multilayering of secondary wall layers in American elm parenchyma cells is described. This includes one additional layer like S 1 –S 3 and protective layers each in vasicentric parenchyma and up to two additional such layers in ray parenchyma. These extra layers are comparable with those mentioned by a few other workers, but they are not necessarily related to tylosis formation as implied by some of these.
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Mesenchymal hamartoma is an uncommon benign hepatic tumor arising from the mesenchyme of the portal triad. This lesion is relatively uncommon, representing 5% of all primary hepatic pediatric tumors. This form of hamartoma usually presents before the age of 2 years, typically with abdominal swelling as the initial symptom. The classic management of these lesions has been excision either by hepatic lobectomy or wedge resection. We present a case of 2-year-old girl with a right hepatic lobe tumor, 66 x 57 x 71 in diameter that was completely removed by right hepatic lobectomy.
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A 54-year-old Turkish male was admitted with a history of nonproductive cough and left chest pain. Chest roentgenogram demonstrated two masses located on different lobes of the left lung. One was a chondromatous hamartoma, the other was a large cell carcinoma.
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Left lung
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Parenchyma
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Left lung
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