Biopsy
Biopsy is the collection of tissue samples for pathological analysis. It is the definitive diagnostic method for lymphoma and is essential for distinguishing lymphoma from inflammatory-bowel-disease. Biopsies also allow grading of tumors, which directly affects prognosis.
Key Facts
- Three methods: surgical biopsy, endoscopic biopsy, and needle aspiration
- Surgical biopsy: most thorough (full thickness), but most invasive; requires anesthesia and delays chemotherapy
- Endoscopic biopsy: less invasive, same-day procedure, but smaller samples; only intestine accessible
- Needle aspiration: least invasive, rarely needs anesthesia, but limited accuracy
- Grading (high vs low-grade) is easiest with actual tissue chunks (not aspirates)
- Low-grade intestinal lymphoma has BETTER prognosis than high-grade (unusual for cancers)
- Species: dogs and cats
Connections (26)
Related Conditions
Essential for distinguishing from other skin diseases
A skin biopsy is the definitive diagnostic method to examine inflamed blood vessels under a microscope.
— may be needed for diagnosis
— diagnostic confirmation
Needed for definitive diagnosis and prognosis
— gold standard diagnosis
— required for definitive diagnosis
— may be needed to rule out other causes
Biopsy distinguishes IBD from lymphoma.
Essential for any suspicious lump at injection site
— may distinguish lipoma types
— definitive diagnosis
Definitive diagnosis requires tissue confirmation.
Tissue analysis determines malignancy grade
Grading determines prognosis and treatment plan
Essential for diagnosis and grading
Essential for distinguishing benign from malignant masses
— required for diagnosis
Kidney needle aspirate usually reveals lymphoma cells.
Aspiration confirms diagnosis and rules out tumor
Required for definitive diagnosis
Tissue sampling needed for definitive malignancy diagnosis