Case Of the Month

Severe Chronic Inflammatory Process In A 10-Year-Old MN DSH Cat: Our Case Of the Month Janaury 2022

A 10-year-old male neutered FIV (+) DSH cat was presented for a mass palpated in the cranial abdomen. Weight loss of >2lbs. but acting normally otherwise. Physical exam found the patient with a BCS of 4/5 and a large spherical mass palpable in cranial abdomen. Radiographs showed a mass effect caudal to stomach with the intestines displaced caudally.

DX

Ultrasound: Undifferentiated mass in the region of the pancreas associated with the spleen and caudate liver, deviating the gastrointestinal tract. Cytology: Abdominal mass - Severe chronic suppurative inflammation consistent with an abscess and bacterial infection.

Outcome

The patient is currently being managed with antibiotics and is stable at this time.

Comments

Comments and recommendations from ultrasound: The mass does not appear resectable. It impinges upon the spleen and could be deriving from the spleen, yet would be an odd pattern for a splenic mass. The mass is likely adhesive to the spleen and not necessarily deriving from it. Exploratory surgery could be considered depending upon the results of the FNA. Chronic suppurative necrotic disease possible depending upon cytology results.

Comments and recommendations from cytology: The cellularity in all of these videos supports a rather severe chronic inflammatory process. There are excellent collections of cells that support an abscess. There are even scattered structures that suggest coccobacillus bacteria. There is no suggestion of malignant cellularity in the collection. Treatment with antibiotics and elimination of the mass may be beneficial for treatment in Tank. This easily could be derived from the pancreas but it could be from other sources as well. A guarded prognosis is warranted in these cases of rather severe inflammation in the abdomen of cats. Culture may be beneficial if material is available.

Sampling

Ultrasound guided FNA of the mass was performed without complication.

Image Interpretation

Ultrasound: The spleen revealed a complex mixed echogenic cystic and hyperechoic parenchymal mass measuring approximately 7+ cm. The mass appeared fairly vascular and occupied much of the mid cranial abdomen. The mass appeared to be deriving from the caudate process of the liver; however, it occupied areas of the pancreas as well. The gastrointestinal tract was deviated by the mass. Free fluid noted in the abdomen, likely owing to mass hemorrhage.

Radiographs: Radiographs revealed undifferentiated cranial abdominal mass and ascites.

Cytology: Submitted are several videos and one image collected from the abdominal mass in the patient. The cellularity is rather uniform throughout all of the videos and the one image consists of necrotic cells. There is necrotic debris interspersed with prominent neutrophils and very few other inflammatory cells. Many of the neutrophils are demonstrating toxicity or degeneration. There are scattered bacteria in the background. In the more hemorrhagic collection, the cellularity is mixed but it is inflammatory. Neutrophils are prominent in those videos as well. The cellularity in all of these videos supports a rather severe chronic inflammatory process. There are excellent collections of cells that support an abscess. There are even scattered structures that suggest coccobacillus bacteria. There is no suggestion of malignant cellularity in the collection.