Peer-reviewed veterinary case report
Why heteroduplex PCR is needed to diagnose lymphoma in dogs
By Takanosu, Masamine et al.·Published in Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·2010·Nasunogahara Animal Clinic, Japan·View original on PubMed →
PetCaseFinder translated the abstract of this peer-reviewed paper into plain English so pet owners can read it. We do not publish original research — every detail traces back to the citation above. How we work →
Original publication title: Heteroduplex polymerase chain reaction is essential for canine receptor rearrangement analysis.
- Species:
- dog
Plain-English summary
A dog with chronic vomiting and swollen lymph nodes was tested for lymphoma, a type of cancer that affects the lymphatic system. Researchers used a special test called polymerase chain reaction (PCR) to look for abnormal lymphocyte growth and then confirmed the results with a technique called heteroduplex analysis. This helped distinguish between true lymphoma and false positives. The study found that the heteroduplex analysis effectively identified lymphoma in the dog’s tissues, reducing the chances of misdiagnosis. This method can be a reliable tool for veterinarians when diagnosing canine lymphoma.
People also search for: dog vomiting swollen lymph nodes · canine lymphoma diagnosis · PCR test for dog cancer
Abstract
Polymerase chain reaction (PCR) for antigen receptor rearrangement is a sensitive technique for detecting lymphocyte-proliferative disorders, but it tends to produce false-positive results, a phenomenon termed pseudoclonality. Heteroduplex analysis, which is useful to distinguish clonal reactions from pseudoclonal ones in dogs, can be applied to avoid misdiagnosis and determine the reliability of results. In the current study, PCR for antigen receptor rearrangement was used to identify clonal proliferation of lymphocytes in duodenal and lymphoid tissue from dogs presenting with chronic vomiting and enlarged peripheral lymph nodes typical of multicentric lymphoma, and the test results were verified with heteroduplex analysis. In the case of almost all of the duodenal samples, even without a histologic diagnosis of lymphoma, a distinct band similar to that observed in the case of lymphoma was obtained for both B- and T-cell clonality. All of the bands obtained from the nonneoplastic duodenum disappeared following heteroduplex analysis of the PCR product, whereas the distinct bands from the lymphoma remained. In the lymph node samples, the pseudoclonal bands that disappeared in the heteroduplex analysis were detected mainly in B cells. In conclusion, heteroduplex analysis with PCR for antigen receptor rearrangement is a suitable tool for diagnosing canine lymphoma and decreasing the possibility of misdiagnosis of pseudoclonality.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/20807937/