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• 17:01, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4AtheromatousEmboli6.jpg (A mesenteric artery also had an atherosclerotic embolus. Again note the cholesterol clefts and thrombotic material that occlude this artery.)
• 17:01, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4AtheromatousEmboli5.jpg (This is another view of this vessel with an atherosclerotic embolus. Note the cholesterol clefts (1) and thrombotic material (2) that occlude this artery.)
• 17:01, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4AtheromatousEmboli4.jpg (This higher-power photomicrograph of one of the arcuate arteries reveals a cholesterol embolus. Note the needle-shaped space (arrow) within the lumen of this artery (arrow) which represents the space occupied by the cholesterol crystal that was dissolv...)
• 17:00, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4AtheromatousEmboli3.jpg (This is a low-power photomicrograph of kidney tissue. Several blood vessels can be identified at the corticomedullary junction (arrows).)
• 17:00, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange11.jpg (This gross photograph of liver demonstrates severe nodular cirrhosis. Note the extensive scarring of the capsule and the nodular projections of tissue through the uncut capsule in this tissue. The green color is due to the accumulation of bile pigment.)
• 17:00, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4AtheromatousEmboli2.jpg (This is a closer view of the luminal surface of the aorta from the previous image. The rough, ulcerated surface and the thrombotic material can be easily seen in this image.)
• 17:00, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange10.jpg (This is a low-power photomicrograph of liver stained with a trichrome stain. In this section, connective tissue stains green (arrows) and hepatic parenchymal cells are red. Note that many of the parenchymal cells have clear spaces indicating fatty dege...)
• 17:00, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4AtheromatousEmboli1.jpg (This is a gross photograph of the aorta from this patient opened lengthwise with the luminal surface visible. Note the rough surface with ulcerations and adherent thrombotic material. There is a mild dilation (aneurysm) at the distal aorta just at the ...)
• 16:59, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange9.jpg (This photomicrograph of the liver is from another patient with a history of alcohol use. There are some clear vacuoles indicating fat droplets (1) and there are numerous red-staining granular deposits within the cytoplasm of hepatocytes (2)--this is al...)
• 16:58, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange8.jpg (An oil red O stain for fat was performed on a frozen section of this liver tissue. The red droplets represent fat in the tissue which is typical of fatty degeneration in the liver. By using frozen sections the tissues do not have to be dehydrated throu...)
• 16:58, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange7.jpg (A high-power photomicrograph of the liver parenchyma shows that each individual liver cell is filled with a large, clear droplet which represents the space remaining after lipid was dissolved by the dehydration procedure used to embed the tissue. '''No...)
• 16:57, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange6.jpg (Another view at the same power illustrates the proliferation of bile ducts in the interlobular and perichordal regions (arrows).)
• 16:56, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli8.jpg (This is a high-powered photomicrograph of a myocardial abscess stained with a special tissue Gram stain (Brown & Brenn) to illustrate the colonies of bacteria in this myocardial tissue (arrows).)
• 16:56, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange5.jpg (This higher-power photomicrograph of the centrilobular area gives the appearance of fatty tissue, as indicated by many empty spaces. Very few normal liver cells can be seen in this slide. A few more normal-appearing hepatocytes are present at the left ...)
• 16:56, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli7.jpg (This is a higher-power photomicrograph of the abscess within the myocardium illustrating colonies of bacteria as the dark blue-staining material (arrow).)
• 16:56, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli6.jpg (This is a low-power photomicrograph of myocardium with septic abscesses (arrows).)
• 16:56, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange4.jpg (A higher-power photomicrograph illustrates more clearly the inflammatory cells (arrows) around the portal areas.)
• 16:55, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli5.jpg (This is a higher-power photomicrograph of one of these septic abscesses illustrating the colonies of bacteria within necrotic cellular debris (arrows). This is typical of an abscess.)
• 16:55, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange3.jpg (Another low-power photomicrograph illustrates again the pale, washed-out appearance of this tissue. Notice the numerous holes throughout the tissue. There are accumulations of inflammatory cells (arrows) around portal tracts.)
• 16:55, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli4.jpg (This is a higher-power photomicrograph of the focal lesions in the lung produced by the septic emboli. Note these are clearly demarcated from the relatively normal surrounding lung tissue.)
• 16:55, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli3.jpg (This low-power photomicrograph shows a section of lung on the left and myocardium on the right. Both pieces of tissue have multiple embolic lesions seen as blue staining areas with massive infiltration of inflammatory cells (arrows).)
• 16:54, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli2.jpg (This is a gross photograph of myocardium with multiple embolic lesions scattered throughout the left and right ventricles.)
• 16:54, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange2.jpg (This low-power photomicrograph of liver illustrates a very pale-staining section with a uniform appearance throughout the section.)
• 16:54, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4SepticEmboli1.jpg (This gross photograph of lung demonstrates microabscesses due to septic embolization. Note the small 2 to 3-mm lesions scattered throughout this lung tissue (arrows).)
• 16:53, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange1.jpg (This gross photograph of liver tissue illustrates the yellowish color of the liver parenchyma. The yellow color indicates high fat content in this tissue. Compare this with the normal dark red color of liver.)
• 16:50, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus10.jpg (This is a gross photograph of the fibrous band between the uterus and adjacent tissues. This fibrous scar tissue is probably left over from a previous surgery or an infection. A loop of bowel herniated through the opening produced by this fibrous band ...)
• 16:49, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus9.jpg (This is a gross photograph of an opened abdomen at autopsy demonstrating loops of infarcted bowel (arrow). Vascular occlusion can lead to ischemic necrosis of the bowel. In this case, a section of bowel herniated through a fibrous connective tissue ban...)
• 16:49, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus8.jpg (This is a gross photograph of cut section of testis from previous image. The tissue is filled with blood.)
• 16:48, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus7.jpg (This is a gross photograph of an infarcted testis. Because of the anatomy of the blood supply to the testis, torsion or the blood vessels often leads to venous occlusion (due to compression of the thin walled veins) but not arterial occlusion. Thus, bl...)
• 16:48, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus6.jpg (This is a low-power photomicrograph of the infarcted lung. The tissue is congested and has a very bland appearance due to coagulation necrosis of the lung parenchyma. You can still see the outlines of the alveoli and the cells that make-up the alveoli ...)
• 16:48, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus5.jpg (This is a photomicrograph of the wall of the pulmonary artery (1) containing the thromboembolus. In this case the artery wall looks normal. If this was a thrombus instead of a thromboembolus, you would expect to see some damage in the artery wall that ...)
• 16:47, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus4.jpg (This is a low-power photomicrograph of lung. A large thrombus is lodged at this branch point in the pulmonary artery. Note the hemorrhage and congestion in the surrounding lung parenchyma.)
• 16:47, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus3.jpg (This is a gross photograph of portions of muscle from the legs including sections of leg veins. Note that the leg veins contain thrombus (arrows).)
• 16:46, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus2.jpg (This is a gross photograph of the heart with the main pulmonary artery opened. Note the thromboembolus filling the pulmonary artery (arrows).)
• 16:46, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thromboembolus1.jpg (This is a gross photograph of a cut section of lung demonstrating thromboemboli in the pulmonary arteries (arrows).)
• 16:41, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis10.jpg (This is a high-power photomicrograph of the luminal surface of a re-canalized vessel. Note that the vessel lumen is lined by endothelial cells (arrows).)
• 16:40, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis9.jpg (This is a higher-power photomicrograph of another region of the vessel wall. The adventitia (1) and the media (2) contain inflammatory cells. The recanalized portion of the vessel (3) is composed of fibrous connective tissue and contains numerous small...)
• 16:40, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis8.jpg (This is a higher-power photomicrograph of the vessel wall. The adventitia (1) and the media (2) contain inflammatory cells. The recanalized portion of the vessel is composed of fibrous connective tissue and contains numerous small blood vessels. There ...)
• 16:40, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis7.jpg (In this low-power photomicrograph of another coronary artery from this patient, a mural thrombus has undergone re-organization. The mural thrombus has been invaded by the in-growth of fibroblasts and small blood vessels from the wall of the artery. The...)
• 16:39, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis6.jpg (This is a higher-power photomicrograph of thrombus attached to the wall of the vessel. Note the early organization with in-growth of fibroblasts and small blood vessels from the wall of the artery (arrows).)
• 16:38, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis5.jpg (This is a high-power photomicrograph of thrombus attached to the wall of the vessel. There is early organization of the thrombus (arrow).)
• 16:38, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification2.jpg (This low-power photomicrograph of the patient's lung illustrates large, open alveolar spaces. The pleural surface is the curved surface at the top.)
• 16:36, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis4.jpg (This is another high-power photomicrograph of the ruptured fibrous cap (arrows) with hemorrhage (1) into the atherosclerotic plaque. Note the presence of cholesterol crystals.)
• 16:36, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification8.jpg (This gross photograph affords a closer view of the same aortic valve. Note the nodularity and thickening of this valve due to fibrosis and dystrophic calcification.)
• 16:36, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis3.jpg (This is a higher-power photomicrograph of the ruptured fibrous cap (arrows) with hemorrhage (1) into the atherosclerotic plaque.)
• 16:36, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification7.jpg (A closer view of this same aortic valve (arrow) illustrates the nodularity and thickening of this valve. This valve would be extremely stiff and almost entirely immobile. This particular example of dystrophic calcification is associated with a degenera...)
• 16:35, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis2.jpg (This is a low-power photomicrograph of thrombosed coronary artery. The thrombus (1) completely occludes the vessel. Note the layering of the thrombus. The fibrous cap is ruptured (arrow) and there is hemorrhage into the atherosclerotic plaque. Note the...)
• 16:35, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification6.jpg (Metastatic calcification is only one of two forms of pathologic calcification. Unlike metastatic calcification, dystrophic calcification does not require an increase in serum calcium levels. This is a gross specimen of a heart with dystrophic calcifica...)
• 16:35, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4Thrombosis1.jpg (This is a gross photograph of thrombosed coronary artery (arrows).)
• 16:34, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification5.jpg (This photomicrograph demonstrates pulmonary alveoli with extensive calcium depositions (1) in the septa and protein accumulations (2) in the alveoli.)

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