A 13-year-old SF DLH cat was presented for evaluation of a retroperitoneal mass that was evident on survey radiographs.
A 13-year-old SF DLH cat was presented for evaluation of a retroperitoneal mass that was evident on survey radiographs.
Case Study
Adrenal mass with caval invasion in a 13 year old FS DLH cat
Sonographic Differential Diagnosis
Retroperitoneal mass, which likely derives from the left adrenal mass. These masses invade the vena cava and extend caudally. Adenocarcinoma and pheochromocytoma are both possible. Pheochromocytoma is exceedingly rare in a cat, yet the sonographic behavior would be more consistent with pheochromocytoma than adenocarcinoma.
Image Interpretation
The caudal abdomen in this patient revealed a retroperitoneal, mixed, hypoechoic mass that invaded into the body wall and the vena cava and measured 5 x 4.7 cm. Mixed, hyperechoic surrounding capsular changes were also noted. The majority of the left adrenal gland was normal and measured 0.5 cm. However, it appeared to expand into a 2.5 cm echogenic mass, which was similar in echogenicity to the body wall mass. These two masses appear to be connected by a thin “isthmus” of tissue.
DX
Adrenal mass with invasion of body wall and vena cava
Outcome
None
Comments
Very guarded to poor prognosis. This does not appear to be resectable, but may be amenable to chemotherapy or radiation therapy and potential debulking. CT evaluation or surgical exploratory is necessary for further definition. Serial blood pressure measurements are recommended to assess for systemic hypertension.
Clinical Differential Diagnosis
Neoplasia, cyst, granuloma or abscess in any of the following organs: adrenal, kidney, muscle, peritoneum.
Sampling
None. 25-gauge fine needle aspirates are recommended for confirmation.
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Patient Information
Patient Name :
Ame P
Gender :
Female, Spayed
Species :
Feline
Type of Imaging : Ultrasound
Status :
Complete
Liz Wuz Here :
Yes
Code :
07_00156
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