This photo is from an aspirate of a pink, ‘warty’ dermal mass of an 8-yr-old, neutered male, Golden Retriever. The picture consists of a cluster of well-differentiated sebaceous epithelial cells that have moderate amounts of blue, vacuolated cytoplasm, round nuclei, and finely stippled chromatin. A few...
A blood smear from a 10-year-old, spayed female, mixed breed dog was evaluated. The patient was febrile, reluctant to jump in and out of the car, and hyporexic. Approximately 25% of neutrophils contained rickettsial morulae (see figure for example) that were irregularly round, 1-2 microns, grey with a granular to punctate appearance. A moderate thrombocytopenia and mild, non-regenerative...
Aspirates from malignant melanomas can have a varied cytologic appearance, ranging from a round cell appearance to clusters of cells suggestive of epithelial origin to individual, fusiform-shaped cells that are non-specific for mesenchymal cell origin. All three appearances may be present in aspirates from the same tumor. Making a definitive diagnosis of...
A liver aspirate from a 13-year-old, spayed female, mixed breed dog with increased ‘liver enzymes’. A cluster of well-differentiated hepatocytes is present (Figure 1). The cytoplasm is of a thinner density than normal and has a moth-eaten appearance that causes mild cytoplasmic distension. The background is a...
Aspiratefrom a lymph node from a6.5-year-old, neutered, male cat.The lymph node had been mildly enlargedfor months and had recently started growing.The image consists a few macrophages, three small lymphocytesand twoneutrophils. Several of the macrophages contain 2-4 μm, oval yeast (Histoplasma capsulatum) with a thin, clear,...
Aspirate from a vaginal mass of a 5-year-old, spayed female Golden Retriever that had been rescued from Turkey. The image consists of many red blood cells, a rare neutrophil, and several individual round cells with abundant light gray cytoplasm that commonly contain few to several...
Aspirate from a 1cm, circular, raised pink dermal mass on the pinna of a 3-year-old spayed female Bull terrier. The mass has been present for 1-2 weeks and has grown slightly. The image consists of few red blood cells, very few small lymphocytes and neutrophil,...
Aspirate from a kidney nodule of a 2-year- old spayed female domestic shorthair feline. The presenting complaint was weight loss and PU/PD. Blood work revealed moderate azotemia. On ultrasound, the kidneys were bilaterally enlarged with ill-defined nodules throughout. A nodule from one kidney was aspirate...
Aspirate from an abdominal mass of a 5-year-old spayed female Shetland Sheepdog. The presenting complaint was anorexia and vomiting for 1.5 weeks. An abdominal radiograph suggested a possible mid-abdominal mass. On ultrasound, a mixed echogenicity liver mass and an extremely large mixed echogenicity abdominal mass...
An 11-year-old spayed female Boston Terrier had a mass removed two months ago, but it was not submitted for histopathologic evaluation. Just caudal to the scar from the previous surgery, a large soft mass is now present, which is possibly the inguinal lymph node. Many...