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• 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.)
• 17:00, 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 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...)
• 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 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 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 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.)
• 16:54, 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.)
• 16:53, 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.)
• 16:38, 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 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 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 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...)
• 16:34, 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.)
• 16:34, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification4.jpg (This high-power photomicrograph of a blood vessel shows calcium deposits in the vascular wall (1) and proteinaceous material (2) (from edema) within some of the alveoli. The smooth muscle in the vessel wall has been almost completely replaced by calciu...)
• 16:33, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification3.jpg (A higher-power photomicrograph shows a blood vessel cut in longitudinal section (1). Several of the alveoli are filled with a pink-staining proteinaceous fluid (2) indicative of pulmonary edema. The alveolar septa and the wall of the blood vessel have ...)
• 16:32, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Calcification1.jpg (This is a gross photograph of the cut section of the patient's lung showing evidence of severe metastatic calcification. The lung tissue has a rough, firm appearance with open airways.)
• 16:12, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy10.jpg (This gross photograph shows a normal brain (left) and a brain from a geriatric patient (right). Note the decreased size, the narrowed gyri, and the widened sulci of the brain from this octogenarian. What is the cause of atrophy in this case?)
• 16:11, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy9.jpg (The two kidneys in this slide are from the same patient. One kidney (1) is relatively normal, although increased in size due to compensatory hypertrophy. The other kidney (2) is very small with only rudimentary nodules of renal parenchyma. This kidney ...)
• 16:11, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy8.jpg (These kidneys were removed from a patient who had blockage of one ureter leading to increased pressure in the renal pelvis. The increased pressure produced hydronephrosis (arrow) in one kidney. What is the cause of atrophy in this case?)
• 16:10, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy7.jpg (In this gross photograph of kidneys and the abdominal aorta, there is narrowing of the left renal artery at its ostium from the aorta. This atherosclerotic narrowing of the renal artery causes reduced blood pressure in the kidney whose artery is affect...)
• 16:07, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy6.jpg (In this slide, the atrophy of the tubules is extending to include the Rete testes (arrow) as well.)
• 16:05, 19 August 2013 Peter Anderson (talk | contribs) deleted page File:IPLab2Atrophy5.jpg (Deleted old revision 20130819160450!IPLab2Atrophy5.jpg)
• 16:04, 19 August 2013 Peter Anderson (talk | contribs) uploaded a new version of File:IPLab2Atrophy5.jpg (A seminiferous tubule is shown on the left containing remnants of spermatocytes (1). There are no mature sperm present. On the right-hand portion of the slide are remnants of other spermatic tubules which have completely atrophied and lost all of their...)
• 16:03, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy4.jpg (This is a higher-power photomicrograph indicating loss of testicular parenchymal tissue. There are very few recognizable spermatic cells in this tissue. The cluster of cells in the upper right is a focus of interstitial or Leydig cells (arrow). These c...)
• 16:02, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy5.jpg (This is a higher-power photomicrograph indicating loss of testicular parenchymal tissue. There are very few recognizable spermatic cells in this tissue. The cluster of cells in the upper right is a focus of interstitial or Leydig cells (arrow). These c...)
• 16:01, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy3.jpg (This is a higher-power photomicrograph of an atrophic testis. In this section there are seminiferous tubules with viable cells (1) although there are no visible spermatocytes. Other seminiferous tubules are completely acellular and have a pale pink hya...)
• 16:01, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy2.jpg (This is a low-power photomicrograph of an atrophic testis. Attached to the testis are several vessels (arrow) which are part of the epididymis and the vas deferens.)
• 16:00, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Atrophy1.jpg (This is a gross photograph of an atrophied testis (arrows).)
• 15:45, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia7.jpg (This is a photomicrograph of the trachea from a smoker. Note that the columnar ciliated epithelium has been replaced by squamous epithelium.)
• 15:45, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia6.jpg (A high-power photomicrograph of the squamous epithelium shows inflammatory cells in the subepithelial tissue and the formation of keratinized epithelium (arrows).)

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