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(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)- 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).)
- 16:08, 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 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).)
- 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.)
- 04:30, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction7.jpg (This is a photomicrograph of the lines of Zahn. Pale areas (1) represent platelets with some fibrin and the darker lines (2) represent RBCs and leukocytes enmeshed in fibrin strands.)
- 04:30, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction6.jpg (This is a low-power photomicrograph of a mural thrombus (1) adherent to the endocardial surface (arrows).)
- 04:30, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction5.jpg (This is a high-power photomicrograph of another area of this section. There are several hypereosinophilic cells within this section (arrows).)
- 04:30, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction4.jpg (This is a higher-power photomicrograph of the edge of the infarct. The accumulation of inflammatory cells is on the left (1) and the infarcted tissue is on the right (2). Note that intact cells can be seen in the infarct but there are no nuclei.)
- 04:29, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction3.jpg (This is a photomicrograph of the edge of the infarct with normal tissue on the left (1). The accumulation of inflammatory cells (2) is at the edge of the infarcted tissue (3).)
- 04:29, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction2.jpg (This is a higher-power photomicrograph which shows more clearly the viable tissue along the epicardium (1), the blue line of inflammatory cells (2), and the infarcted myocardium (3).)
- 04:29, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3AcuteMyocardialInfarction1.jpg (This is a low-power photomicrograph of infarcted heart. There is a layer of surviving myocardial tissue (1) along the epicardium and then a blue line (2) which represents the accumulation of inflammatory cells at the border of the infarct. There is thr...)
- 04:24, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction11.jpg (This is a closer view of the brain demonstrating an old healed infarct with the meninges containing blood vessels (arrow) overlying the infarcted region.)
- 04:24, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction10.jpg (This is a gross photograph of a brain from another patient with an old healed infarct. Note the meninges overlying the infarcted region (arrow).)
- 04:23, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction9.jpg (This is a photomicrograph of the edge of the infarct. Note the gitter cells, gemistocytic astrocytes, and some hemosiderin-laden macrophages (arrows).)
- 04:23, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction8.jpg (This is a high-power photomicrograph of gitter cells (arrows).)
- 04:23, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction7.jpg (This is a photomicrograph of the edge of the infarct. The macrophages that are full of brain tissue (“gitter cells”) are at the top of the image (arrows) and the brain parenchyma containing gemistocytic astrocytes is at the bottom.)
- 04:22, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction6.jpg (This is a photomicrograph of brain tissue adjacent to the area of infarction. There are numerous activated gemistocytic astrocytes (arrows).)
- 04:22, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction5.jpg (This is a higher-power photomicrograph of the previous image showing that the inflammatory cells (arrows) are primarily macrophages and microglia which have phagocytosed the dead brain tissue.)
- 04:22, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction4.jpg (This is a photomicrograph of the edge of the infarct. Note the numerous inflammatory cells in the brain parenchyma and adjacent to the remaining brain tissue (arrows).)
- 04:22, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction3.jpg (This is a low-power photomicrograph of brain at the edge of the infarct. Note the loss of brain parenchyma (arrows).)
- 04:22, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction2.jpg (This is a gross photograph of a cross-section of brain demonstrating the areas of infarction (arrows).)
- 04:21, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3BrainInfarction1.jpg (This is a gross photograph of the brain which contains two areas of infarction (arrows).)
- 04:17, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer11.jpg (This is a trichrome-stained section of tissue demonstrating fibrous connective tissue scar formation (blue color) in this lesion. The surface of the ulcer is at the left-hand side of the image. There is a layer of inflammatory cells and RBCs on the sur...)
- 04:17, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer10.jpg (This is a photomicrograph of the serosal surface (1) from a section of stomach near the ulcer. Note that the inflammatory reaction extends out to the serosa.)
- 04:17, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer9.jpg (This high-power photomicrograph demonstrates the granulation tissue within the base of the ulcer.)
- 04:16, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer8.jpg (This low-power photomicrograph demonstrates the healing reaction in the base of this ulcer. The base of the ulcer is at the left-hand side of the image and the serosal surface is at the right. Note the fibrous connective tissue within the wall of the s...)
- 04:16, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer7.jpg (This high-power photomicrograph of the ulcer base demonstrates plump, activated fibroblasts and endothelial cells (arrows) within the granulation tissue that makes up the base of the ulcer. There are inflammatory cells (primarily lymphocytes) within th...)
- 04:16, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer6.jpg (This high-power photomicrograph of the ulcer base (arrows) demonstrates the lack of epithelium and the exuberant inflammatory response (1) consisting of primarily of fibrin (and adherent gastric secretions) and PMNs. The surface of the ulcer bed is cov...)
- 04:16, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer5.jpg (This is a medium-power photomicrograph of the base of the ulcer with the fibrinopurulent membrane (1) overlying the ulcerated surface. The ulcerated surface contains granulation tissue and inflammatory cells (2).)
- 04:15, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer4.jpg (This is a photomicrograph of the margin of the ulcer. Note the intact epithelium on the right side of the section (1) and the ulcerated region without epithelium on the left (2). There are numerous inflammatory cells within this tissue.)
- 04:15, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer3.jpg (This is a low-power photomicrograph of the transected ulcer. The blue cells on the right hand side of this section are the normal gastric epithelial cells of the mucosa (1). Note the absence of any epithelial cells within the crater of the ulcer (2).)
- 04:15, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer2.jpg (This is a gross photograph of the ulcer after it has been transected. The edge of the mucosa (1) is better appreciated in this image. Note the thick, fatty tissue (2) which makes up the base of this ulcer (3).)
- 04:14, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3ChronicPepticUlcer1.jpg (This is a gross photograph of a stomach containing an ulcer. Note the folded pink gastric mucosa that extends up to the edge of the ulcer (arrows).)
- 04:10, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3FibrinousPericarditis5.jpg (This high-power photomicrograph demonstrates fibrin (red amorphous material) on the surface of the pericardium (1). Note the reactive mesothelial cells on the surface of the pericardium (arrows) and the inflammatory cells within the pericardial tissue.)
- 04:10, 19 August 2013 Seung Park (talk | contribs) uploaded File:IPLab3FibrinousPericarditis4.jpg (This is a higher-power photomicrograph demonstrating fronds of fibrin (arrows) projecting from the surface of the pericardium.)