Morgan KRS, North CE, Thompson DJ. Sonographic features of peritoneal lymphomatosis in 4 cats.
J Vet Intern Med 2018;
32:1178-1184. [PMID:
29572942 PMCID:
PMC5980441 DOI:
10.1111/jvim.15099]
[Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 01/17/2018] [Accepted: 02/13/2018] [Indexed: 12/13/2022] Open
Abstract
Background
The metastatic spread of feline lymphoma to the peritoneum (“lymphomatosis”) has been rarely reported in the literature. The sonographic features specific to this rare disease manifestation have not been described and have important treatment and prognostic considerations prompting definitive diagnosis.
Objectives
To describe the ultrasonic features of feline peritoneal lymphomatosis.
Animals
Four cats with alimentary lymphoma and peritoneal metastasis confirmed using cytology, histology, or both.
Results
The sonographic features described include either a nonobstructive, focally diffuse, and circumferential intestinal mass, or an eccentric, focally diffuse, gastric mass. The intestinal and gastric lesions exhibited hypo‐to‐anechoic transmural wall thickening with loss of wall layering in association with discrete‐to‐coalescing plaques or sheets of thickened, hypoechoic tissue throughout the mesentery or omenta. All cases exhibited only small volumes of anechoic free peritoneal fluid. Three of the 4 cats also had multiple small hypoechoic nodular foci on the parietal and/or visceral peritoneal surfaces. Two cats had bilateral renomegaly because of lymphoma invasion (2/4) and 1 cat had local lymphadenopathy secondary to lymphoma invasion (1/4).
Conclusions and Clinical Importance
Peritoneal lymphomatosis is a rare manifestation of lymphoma metastasis and to date appears to be associated specifically with B‐cell alimentary lymphoma.
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