UNDIFFERENTIATED CARCINOMA Figure 8-19 UNDIFFERENTIATED CARCINOMA There is a combination of malignant mononuclear cells and malignant pleomorphic giant cells (Thinprep). More about this image found in UNDIFFERENTIATED CARCINOMA There is a combination of malignant mononuclear...

MALIGNANT MESOTHELIOMA Figure 13-44 MALIGNANT MESOTHELIOMA Left: Localized cases can present within the pancreas; note the adjacent pancreatic tissue (lower right). Right: The neoplasm has a microcystic and papillary pattern. More about this image found in MALIGNANT MESOTHELIOMA Left: Localized cases can present within the pancre...

METASTATIC MALIGNANT MELANOMA Figure 14-9 METASTATIC MALIGNANT MELANOMA Left: The black to brown color reflects the presence of melanin pigment. Right: Amelanotic melanoma is tan and soft, and resembles solid primary pancreatic neoplasms grossly. More about this image found in METASTATIC MALIGNANT MELANOMA Left: The black to brown color reflects the ...

METASTATIC MALIGNANT MELANOMA Figure 14-10 METASTATIC MALIGNANT MELANOMA Left: The classic histologic features include a diffuse pattern and epithelioid cells with abundant cytoplasm and prominent nucleoli. Right: Other cases are noncohesive and have little cytoplasm. More about this image found in METASTATIC MALIGNANT MELANOMA Left: The classic histologic features includ...

METASTATIC MALIGNANT MELANOMA Figure 14-11 METASTATIC MALIGNANT MELANOMA Individually arranged large epithelioid cells have abundant cytoplasm and prominent nucleoli (Diff Quik stain). More about this image found in METASTATIC MALIGNANT MELANOMA Individually arranged large epithelioid cell...

SOLITARY FIBROUS TUMOR Figure 13-22 SOLITARY FIBROUS TUMOR Highly cellular atypical spindle cells from a malignant solitary fibrous tumor (Diff Quik stain). More about this image found in SOLITARY FIBROUS TUMOR Highly cellular atypical spindle cells from a malig...

DUCTAL ADENOCARCINOMA Figure 7-18 DUCTAL ADENOCARCINOMA A,B: Invasion into the muscularis propria of the duodenum by remarkably well-differentiated malignant glands. C: Invasion into the mucosa of the duodenum with colonization of the basement membrane of the villi can mimic an in situ neoplasm.... More about this image found in DUCTAL ADENOCARCINOMA A,B: Invasion into the muscularis propria of the duo...

LYMPHOEPITHELIAL-LIKE INVASIVE SQUAMOUS CELL CARCINOMA Figure 3-26 LYMPHOEPITHELIAL-LIKE INVASIVE SQUAMOUS CELL CARCINOMA Nests of malignant epithelial cells are heavily infiltrated and surrounded by a predominantly lymphoplasmacytic infiltrate. More about this image found in LYMPHOEPITHELIAL-LIKE INVASIVE SQUAMOUS CELL CARCINOMA Nests of malignant ...

CARCINOSARCOMA Figure 3-56 CARCINOSARCOMA This malignant neoplasm is composed of a high-grade adenocarcinoma admixed with distinct malignant mesenchymal elements, in this case with cartilaginous differentiation. More about this image found in CARCINOSARCOMA This malignant neoplasm is composed of a high-grade adenoca...

MALIGNANT PERIPHERAL NERVE SHEATH TUMOR Figure 3-66 MALIGNANT PERIPHERAL NERVE SHEATH TUMOR The tumor shows a spindle cell morphology with alternating cellularity and perivascular accentuation (right aspect), similar to those that arise at extragenital sites. More about this image found in MALIGNANT PERIPHERAL NERVE SHEATH TUMOR The tumor shows a spindle cell mor...

MALIGNANT PERIPHERAL NERVE SHEATH TUMOR Figure 5-84 MALIGNANT PERIPHERAL NERVE SHEATH TUMOR A: The tumor often has a fascicular arrangement and discernible nuclear atypia. B: Tumor cells are elongated with hyperchromatic nuclei. C: Loss of nuclear H3K27me3 staining is a helpful feature in this ... More about this image found in MALIGNANT PERIPHERAL NERVE SHEATH TUMOR A: The tumor often has a fascicula...