IPLab:Lab 1:Fat Necrosis
Contents
Clinical SummaryEdit
This was a 37-year-old female with chronic renal failure who underwent a cadaveric renal transplant. Following transplantation she developed oral candidiasis, pneumonia, pyuria, and gastrointestinal bleeding. Subsequently, the patient became septic and died.
Major findings at autopsy included extensive hemorrhagic bronchopneumonia and multiple ulcers affecting the stomach and esophagus. There was also evidence of disseminated intravascular coagulation (DIC) with multiple hemorrhages present. Firm, whitish foci of necrotic tissue were found in the fat around the pancreas.
Autopsy FindingsEdit
Major findings at autopsy included extensive hemorrhagic bronchopneumonia (Pseudomonas aeruginosa) and multiple ulcers affecting the stomach and esophagus. There was also evidence of disseminated intravascular coagulation (DIC) with multiple hemorrhages present. Firm, whitish foci of necrotic tissue were found in the fat around the pancreas.
ImagesEdit
This gross photograph shows the intestines and omentum at autopsy. Note the small (5-15 mm in diameter) white nodules on the surface of the omental and mesenteric fat tissue (arrows).
This gross photograph of the pancreas from this case shows white nodules (arrows) in the pancreas and the adjacent mesenteric fat tissue.
This low-power photomicrograph of the pancreas from this case shows the fat tissue (1) surrounding the pancreas. Note the rim of inflammatory cells (arrows) and the blue areas in the fat adjacent to the pancreas (2).
This high-power photomicrograph shows areas of inflammation (1) and fat necrosis (arrows) in the peripancreatic fat tissue (2) of the pancreas from this case.
Another high-power photomicrograph shows blue discoloration in the fat tissue in the interlobular spaces (1) of the pancreas.
A higher-power photomicrograph of the previous slide contains a small area of fat necrosis (1) in the upper right portion of the image. The fat necrosis is within the fat tissue that is normally found adjacent to the pancreas. The appearance of the pancreatic tissue in this area is somewhat disrupted due to autolysis (the pancreas autolyzes very rapidly after death) but there is some premortem necrosis as well.
This is a higher-power photomicrograph of the fat necrosis involving the fat cells in the interlobular spaces (arrow) of the pancreas. Note the blue to purple staining of the calcium deposits within the fat cells.
This high-power photomicrograph demonstrates fat necrosis in the interlobular spaces of the pancreas. Note the granular blue-staining calcium deposits (arrows) within the fat cells. The clear areas represent artifact caused by the "washing-out" of fat from cells during tissue processing for histology.
This is another high-power photomicrograph demonstrating the calcification (arrows) seen in fat necrosis involving the interlobular spaces of the pancreas.
Virtual MicroscopyEdit
Study QuestionsEdit
Additional ResourcesEdit
ReferenceEdit
Journal ArticlesEdit
- Forsmark CE, Vege SS, Wilcox CM. Acute Pericarditis. N Engl J Med" 2016; 375:1972-1981. November 17, 2016.
- LeWinter MM. Acute Pericarditis. NEJM 2014 Dec 18;371:2410-2416.
ImagesEdit
Renal failure is the severe reduction of renal function and often leads to reduced urinary output.
Candidiasis is an infection by the fungus Candida in the oral cavity.
In alcoholics, aspiration pneumonia is common--bacteria enter the lung via aspiration of gastric contents.
Pyuria is the presence of white blood cells (pus) in the urine.
Sepsis is the presence and persistence of pathogenic microorganisms and their toxins in the blood.
DIC is the development of small thrombi within the microcirculation throughout the body.