Here, the central zone cells are hyperplastic. Despite the cribriform structure, the bland nuclei rule out intraepithelial neoplasia or cribriform cancer. Also note the surrounding dense stroma of the central zone.
Peripheral blood smear shows leukocytosis where almost all the cells are mature neutrophils with normal morphology. It is characteristic of chronic neutrophilic leukemia that no (or at most < 5%) immature cells at earlier stage than neutrophils and bands are noted in the peripheral blood. The neutrophils show adequate segmentation and no dyspoietic features (Wright Giemsa, 400x magnification or 40x objective).
57 year old man with positive Jo1 antibody and interstitial lung disease. H&E shows necrotic fibers and myophagocytosis predominantly involving perifascicular fibers. The perimyisial connective tissue appears edematous and fragmented.
A monophasic sarcomatoid carcinoma shows only a spindle cell component with mesenchymal appearance, without admixed carcinoma. Extensive sampling and history of prostatic adenocarcinoma, preferably with immunohistochemical (keratins, rarely PSA or other prostatic markers) evidence of epithelial differentiation, helps establish the diagnosis.
Periodic acid-Schiff with diastase (PASD) highlights the basement membrane of bile ducts. It also stains alpha-1 antitrypsin globules in hepatocytes in the setting of alpha-1 antitrypsin deficiency. The lack of globules in this image is a normal finding.
Solid areas of the tumor are formed by different proportions of epidermoid (squamous) cells (red arrow), mucus cells (green arrow) and intermediate cells (yellow arrow) (histopathology, H&E stain, 10x).
Leiomyosarcoma of the vulva, morphologically low grade, with moderately atypical, round to cigar shaped nuclei with focally prominent nucleoli (400x). Mitoses are rare (1 – 2 per 10 high power fields) and necrosis is absent.