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• 18:07, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab6RA6.jpg (This higher-power photomicrograph of the subcutaneous nodule shows a granulomatous lesion with a necrotic center and a peripheral rim of macrophages, fibrocytes, and occasional lymphocytes. In the necrotic center of the granuloma there is some minerali...)
• 18:07, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Antitrypsin2.jpg (This is a gross photograph of the cut sections of lung from this case. The lung parenchyma is markedly hemorrhagic and consolidated. Again the hemorrhage makes it difficult to appreciate the emphysematous changes.)
• 18:07, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab6RA5.jpg (This is a low-power photomicrograph of the subcutaneous nodule from this patient.)
• 18:06, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Antitrypsin1.jpg (This is a gross photograph of the lungs from this case. The rough friable material on the surface of the lung (arrows) is fibrinous exudate and fibrous tissue. This reaction on the surface of the lung is due to the recent surgery. The emphysematous cha...)
• 18:06, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab6RA4.jpg (This is a gross photograph of the foot from this same patient. Note the subcutaneous nodule on the medial aspect of the foot (arrow).)
• 18:06, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab6RA3.jpg (This is a high-power photomicrograph of the joint capsule with another granuloma surrounding a central area of fibrinoid necrosis (arrow).)
• 18:06, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab6RA2.jpg (This is a medium-power photomicrograph of the joint capsule surrounding the metacarpal joints. Note the thickening of the capsule and the focal accumulation of inflammatory cells surrounding a central area of fibrinoid necrosis (arrow).)
• 18:05, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab6RA1.jpg (This is a gross photograph of the patient's hands at autopsy. Note the swollen joints and the deforming arthritis.)
• 17:54, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney11.jpg (This is a higher-power photomicrograph of liver cyst. These cystic structures are lined by biliary epithelium.)
• 17:54, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney10.jpg (This is another photomicrograph of liver demonstrating the histologic appearance of these cysts. These cystic structures are associated with the biliary tree.)
• 17:53, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney9.jpg (This photomicrograph of liver demonstrates the histologic appearance of these cysts.)
• 17:53, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney8.jpg (This is a gross photograph of the liver from this patient. Multiple cysts can be seen on the surface of this liver (arrows).)
• 17:52, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney7.jpg (This high-power photomicrograph shows abnormal glomeruli (arrows) and some tubules.)
• 17:52, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney6.jpg (This is a higher-power photomicrograph of polycystic kidney showing the edge of a large cyst (1). In this section there are numerous tubules and dilated collecting ducts (2) that are filled with the same red proteinaceous material as the larger cysts.)
• 17:51, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney5.jpg (This is another low-power photomicrograph of an H&E-stained section from this polycystic kidney. Again note the large cystic structures (arrows)and the fibrous connective tissue throughout this section.)
• 17:51, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney4.jpg (This is a low-power photomicrograph of an H&E-stained section from this polycystic kidney. Note the large cystic structures (1), the few residual glomeruli (2), and the fibrous connective tissue throughout this section.)
• 17:49, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney3.jpg (This is a gross photograph of a cut section from one of these polycystic kidneys. Note that the renal parenchyma is almost completely replaced by cystic structures.)
• 17:44, 19 August 2013 Peter Anderson (talk | contribs) deleted page File:IPLab5PolycysticKidney3.jpg
• 17:43, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney3.jpg (This is a gross photograph of a cut section from one of these polycystic kidneys. Note that the renal parenchyma is almost completely replaced by cystic structures.)
• 17:40, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney2.jpg (This is a gross photograph of the kidneys from this case. Note that both kidneys contain multiple large cysts (arrows).)
• 17:39, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5PolycysticKidney1.jpg (This is a gross photograph of the kidneys from this case. Note that both kidneys contain multiple large cysts (arrows).)
• 17:22, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis8.jpg (This is a high-power photomicrograph of the cells in the neurofibroma.)
• 17:21, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis7.jpg (This higher-power photomicrograph of the neurofibroma shows more clearly the elongated cells (primarily Schwann cells) that make up this tumor.)
• 17:21, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis6.jpg (This is a higher-power photomicrograph of the neurofibroma demonstrating the loose pattern of elongated cells making up the tumor mass.)
• 17:20, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis5.jpg (This is a higher-power photomicrograph of the neurofibroma (1) with the overlying skin (2).)
• 17:19, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis4.jpg (This is a low-power photomicrograph of a subcutaneous neurofibroma (1). Note the increased pigmentation in the skin (2).)
• 17:19, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis3.jpg (This is a closer view of neurofibromas on the skin.)
• 17:19, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis2.jpg (This is another view taken at autopsy demonstrating the neurofibromas. Some lesions can be seen as subcutaneous swellings (arrow) and others form pedunculated masses. Most are hyperpigmented.)
• 17:18, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab5Neurofibromatosis1.jpg (This photograph, taken at autopsy, demonstrates the distribution of neurofibromas on the skin of this patient.)
• 17:02, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2FattyChange12.jpg (This is a cut surface of the same tissue seen in the previous slide. Note the marked nodular pattern. The paler-staining areas between the round nodules represent fibrous connective tissue.)
• 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.)

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