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• 16:22, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion8.jpg (This is a gross photograph of a nutmeg. You can see from the appearance of the cut surface of the nutmeg (arrow) why chronic passive congestion of the liver is sometimes referred to as "nutmeg liver.")
• 16:21, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion7.jpg (This is a high-power photomicrograph of liver with several macrophages that are distended with a brown pigment (arrow). These resident macrophages (Kupffer cells) are part of the reticuloendothelial system and normally line the sinusoidal spaces in the...)
• 16:21, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion6.jpg (This is a high-power photomicrograph of the central vein illustrating congestion and some loss of liver parenchymal cells. A mild increase in connective tissue around the central vein is evident in this section.)
• 16:20, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion5.jpg (This higher-power photomicrograph of the liver lobules shows congestion and red blood cell accumulation in the sinusoidal spaces around the central vein. Note that around the portal triads (arrows) the liver cells are quite normal and there is no evide...)
• 16:20, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion4.jpg (This is a higher-power photomicrograph of liver demonstrating an accentuated lobular pattern with a dark red stain surrounding the central veins in the liver lobules (arrows).)
• 16:20, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion3.jpg (This low-power photomicrograph of liver demonstrates a slightly visible pattern of centrilobular congestion at this magnification.)
• 16:19, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion2.jpg (This is a closer view of a cut section of liver demonstrating the pattern of chronic passive congestion. The central vein regions are red and the surrounding hepatic tissue is pale tan-brown.)
• 16:19, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4ChronicPassiveCongestion1.jpg (This is a gross photograph of a liver demonstrating chronic passive congestion. Note the accentuation of the centrilobular pattern evidenced by the dark-brown-staining areas in this tissue.)
• 16:12, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion7.jpg (This high-power photomicrograph illustrates the edema fluid within the alveoli (1) and the congestion (RBCs) in the alveolar capillaries (arrows).)
• 16:12, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion6.jpg (This is a higher-power photomicrograph showing edema-filled alveoli in the right portion of this section (arrows).)
• 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...)
• 16:08, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion5.jpg (This is a higher-power photomicrograph of lung. The edema fluid within the alveoli is visible at this higher magnification (arrows). The thickened pleura (1) is on the left.)
• 16:07, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion4.jpg (This is a low-power photomicrograph of lung from this case. The lung section has a pale-red color indicating proteinaceous material within the lung.)
• 16:07, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion3.jpg (This gross photograph demonstrates the frothy exudate that is being extruded from the lung tissue.)
• 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.)
• 16:07, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion2.jpg (This is a gross photograph of lung demonstrating acute pulmonary congestion and edema. A frothy exudate fills the bronchus (arrow).)
• 16:06, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab4PulmonaryCongestion1.jpg (This is a gross photograph of lungs that are distended and red. The reddish coloration of the tissue is due to congestion. Some normal pink lung tissue is seen at the edges of the lungs (arrows).)
• 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).)
• 15:44, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia5.jpg (In areas adjacent to the normal transitional epithelium, there are areas of epithelium (arrows) where the epithelial cells have the character of normal squamous epithelium as found in the dermis. However, squamous epithelium is not normal in the renal ...)
• 15:43, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia4.jpg (This is a higher-power photomicrograph of the junction of normal epithelium (1) with hyperplastic transitional epithelium (2).)
• 15:41, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia3.jpg (A higher-power view shows the junction of normal epithelium (1) with hyperplastic transitional epithelium (2). Note the inflammatory cells in the subepithelial tissue.)
• 15:40, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia2.jpg (his high-power photomicrograph demonstrates the transitional epithelium lining the renal calyx (1) and the junction (transition zone) to a thicker hyperplastic epithelium (2). Note the inflammatory cells and increased vascular response in the stromal t...)
• 15:39, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Metaplasia1.jpg (This is a low-power photomicrograph showing the full cortical and medullary thickness of the kidney. Note that there is a dilated calyx containing some red blood cells in the center of the section (arrow). The cortex is markedly thin and has severe les...)
• 15:29, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia9.jpg (This kidney was removed from another autopsy patient who had prostatic hyperplasia resulting in marked urinary retention and back-flow of urine from the bladder into the ureters and renal pelvis. The increased pressure inside the renal pelvis resulted ...)
• 15:29, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia8.jpg (This is a higher-power photomicrograph of papillary folds of hyperplastic epithelium (arrows).)
• 15:29, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia7.jpg (A higher-power view shows the papillary folds (arrows) produced by the hyperplastic epithelium projecting into the lumen of the gland. While these papillary folds project into the lumen of the gland, there is no extension through the glandular basement...)
• 15:28, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia6.jpg (Cystic dilatation of glands is present in this photomicrograph. Notice the accumulation of secretory material inside the glands (arrows) and compression (thinning) of the lining epithelium.)
• 15:28, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia5.jpg (Note these glands, which exhibit hyperplasia of the glandular epithelium. The infolding of the glandular epithelial cells forms papillary projections (arrows) into the lumen of the gland.)
• 15:28, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia4.jpg (The dilated glands (arrows) make up the major portion of the prostate tissue and there is compression of the stroma.)
• 15:28, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia3.jpg (This is a low-power photomicrograph showing hyperplastic prostate on the left (1) and normal prostate on the right (2). At this power, dilated glands are visible in the section of hyperplastic prostate.)
• 15:27, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia2.jpg (This is a close-up of the prostate from this same patient. Note the nodularity of the tissue (1) and the enlargement of the gland. Enlargement of the prostate leads to compression of the urethra as it passes through (2) the gland.)
• 15:27, 19 August 2013 Peter Anderson (talk | contribs) uploaded File:IPLab2Hyperplasia1.jpg (This photograph shows the autopsy specimen from this patient. Included are kidneys (1), ureters (2), bladder (3) (which has been opened), and enlarged prostate (4). Note that the bladder mucosa has multiple trabeculae and the bladder mucosa is hyperemi...)
• 04:39, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction8.jpg (This is a higher-power photomicrograph of a trichrome-stained section of heart containing an old healed MI. The scar tissue (mature fibrous connective tissue) is stained blue.)
• 04:38, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction7.jpg (This is a photomicrograph of a trichrome-stained section of heart containing an old healed myocardial infarction. The scar is composed of mature fibrous connective tissue (arrows).)
• 04:38, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction6.jpg (This is a photomicrograph of a trichrome-stained section from a heart with an acute myocardial infarction. Note that there is little fibrous connective tissue. It is too early for scar formation to have taken place in this acute lesion.)
• 04:37, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction5.jpg (This is a high-power photomicrograph of a different region of this healed MI. Note the chronic inflammatory reaction (arrows) in this region suggesting that there had been ischemic injury to this area within the last several weeks to months.)
• 04:37, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction4.jpg (This is another high-power photomicrograph of a healed myocardial infarction. Note the remaining normal myocytes (1), the fibrous connective tissue (2), and occasional hypereosinophilic myocytes indicating recent acute ischemic injury (arrow).)
• 04:37, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction3.jpg (This is a higher-power photomicrograph of a healed myocardial infarction with a fibrous scar. Remaining normal tissue is at the top (1) and the fibrous connective tissue scar is at the bottom (2). Note the presence of occasional hypereosinophilic myocy...)
• 04:36, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction2.jpg (This is a low-power photomicrograph of a healed myocardial infarction with a fibrous scar. Remaining normal tissue is on the left (1) and the fibrous connective tissue scar is on the right (2).)
• 04:36, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3HealedMyocardialInfarction1.jpg (This is a gross photograph of a heart with areas of old healed myocardial infarction (scars) outlined by arrows.)

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