Intestinal Mast Cell Tumor in an 11-year-old MN DSH Cat: Our Case of The Month May 2016:
Palpable mass in a cat?… what can it be? It’s not always intestinal lymphoma as other round cells can be involved such as mast cell disease… or even non neoplastic pathology such as complicated IBD, spontaneous necrosis, bowel infarction, or even FIP. Have a probe & a needle & Marty Henderson DVM of http://sonovet.us/ will get the answer. Take a look at another variant of the ropey bowel cat pathology and why a needle and a probe are always in need in this SonoPath case of the month.
This 11-year-old MN DSH cat vomited all of his food 3 days ago. Owner noticed grass-eating and some vomiting of grass last week. Normal activity and appetite. Currently on Cerenia and SQ fluids. R/O FB vs pancreatitis vs other.
Most loops of the intestines are WNL - normal bowel layering, wall thicknesses and motility. No mucosal stippling or disproportionate layering appreciated. There is a large hypoechoic heterogeneous mass measuring ~2cm involving the mid-jejunum in the lower right quadrant. The mass is well-circumscribed but the jejunum leading up to the mass has abnormal thickening of the muscularis layer and tapers to normal. The layering in the mass is obliterated and the mass is mildly erupting into the bowel lumen. Hyperechoic ill-defined reactive mesentery is associated with the mass suggestive for an aggressive transumural pathology with associated inflammation/peritonitis. Multiple mesenteric lymph nodes are moderately-severely enlarged and abnormally shaped having homogenous hypoechoic echogenicity.
Sonographic Differential Diagnosis
Scan by Marty Henderson DVM of SonoVet mobile ultrasound, a special thanks to him for providing a fantastic set of images.