Here is a selection of new images from our free, online textbook:
Sheets of undifferentiated malignant epithelial cells with vesicular nuclear chromatin and prominent nucleoli.
Intraplacental choriocarcinoma showing atypical syncytiotrophoblast, cytotrophoblast and intermediate trophoblast adjacent to uninvolved chorionic villi (H&E, 200x).
Contributed by Tatyana Zinger, D.O.
Polypoid lesion predominantly lined by gastric foveolar epithelium and small intestinal epithelium on the left side.
Contributed by Khalid Amin, M.D.
HNF1A mutated hepatocellular adenoma: low power view showing well defined border between the lesion (right) and background liver (left).
Contributed by Monica Abdelmalak, M.D.