More than 1 lesion

The structures that have abnormalities: 1) Both kidney have areas that are slightly more echogenic which could represent masses. 2)There is significant lymph node enlargement with loss of normal LN shape (much wider than proportionate length) suggestive of malignancy vs reactivity. 3)The section of intestine with apparent ileus has an area of the wall that may be abnormal, with loss of distinct layering. Top of the list of differentials would be Lymphoma. First thing next would be to run a FeLV test.

Hello:
Linfatic nodes and yeyunum. Fine neddle aspiration. Thank you for sharing

Loss of renal architecture...mesenteric lymphadenopathy. R/O lymphoma. Need FNA of some LN's & one of the kidneys.

Hyperechoic mass on the renal cortex , multiple lymph nodes enlarges , , sections of intestines are thicken , most likely lymphoma , , FNA of the lymph nodes

Changes are present in the kidneys and jejunal lymph node. Poorly defined hyperechoic lesions are present in the renal parenchyma. The lymph node is enlarged, irregularly shaped, and has decreased echogenicity, while the parenchyma is relatively homogeneous. The most likely diagnosis is feline infectious peritonitis, especially given the patient's age, but lymphoma cannot be completely ruled out. Further steps include a fine-needle aspiration biopsy of the lymph node for PCR diagnostics of infectious peritonitis and, if possible, cytology.

Kidney presents with mild reduction of corticomedullary differentiation and hypoechoic parenchyma. Two focal lesions are evident, both hypoechoic and anechoic, with poorly defined margins and an inaudible color Doppler signal.
A small amount of anechoic fluid is present in the retroperitoneal/perirenal space.
The lymph nodes presented should be the midcolonic lymph nodes, which present with homogeneous parenchyma and echogenicity within normal limits, perhaps slightly increased. The margins are rounded and enlarged. No substantial changes are visible in the intestinal wall of the segments included in the scan plane. The splenic volume may be enlarged due to the presence of a rounded margin, of which only a portion is visible.

DD: Multifocal nephropathy initially suggestive of an infiltrative process of an undetermined nature; acute ischemic disease cannot be ruled out.
Retroperitoneal effusion
Infiltrative lymphadenopathy (undetermined)
Suspected splenomegaly (undetermined)

Thanks for sharing your experience. Best regards.

Simone Longobardi, DVM

With the "capital S" scant peritoneal effusion present would this be catagorized as the wet form or the dry form of FIP? Or is this a simple academic question?
With appreciation, Danelda

For my opinion , Second kidney shows a circular lesion located in the cortex ventro caudal position of the kidney ,hyperchoic.
could be a neoplasia or other , to understand should be better to do a cytology.

ICJ LNs are abnormal

Lymphoma, Enlarged lymph nodes, Perinephric fluid, ? focal pyelonephritis on left kidney.