Here is a selection of new images from our free, online textbook:
Breast > Sparganosis
Host reaction of rimming chronic inflammation and dense fibrosis around parasite (H&E, 4x)
Contributed by Bobbi Pritt, M.D.
CNS tumor > Pituitary adenoma
Sheet-like proliferation of monomorphous cells. Absence of acinar architecture. Frozen section, 20x.
Contributed by Michael Punsoni, M.D.
CNS tumor > Medulloblastoma, SHH activated
Nodular desmoplastic medulloblastoma, SHH activated. High power H&E shows sheets of undifferentiated cells with scattered mitotic figures and apoptotic bodies. Focal anaplastic features are present (cell wrapping, center of image).
Contributed by John DeWitt, M.D., Ph.D.
Kidney tumor > Adult cystic nephroma
Multiple thin walled cysts with smooth lining.
Contributed by Bonnie Choy, M.D.
Autopsy & forensics > Forensic entomology
The irregular, superficial surface erosion of the skin, usually orange-pink to yellow in color and the absence of hemorrhage is typical of postmortem ant feeding artifact.
Contributed by Priya Banerjee, M.D.
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