Before Lymphoma Sampling: Discuss Corticosteroids and Diagnostic Timing

Caregivers whose dog may have lymphoma and who need to discuss how current or proposed corticosteroid use relates to sampling, symptom relief, and treatment planning.

Tell the team about every steroid exposure before sampling; balance urgent symptom control with the possibility that treatment can alter cytology, histology, immunophenotyping, or later response.

Do not start, stop, taper, or change a corticosteroid without the prescribing veterinarian. Bring the exact product, route, administration history, indication, and response, including injections, ear or skin products, and medicines from another clinic. Severe breathing, spinal, calcium, or other emergencies may require treatment before ideal testing. If instructions conflict, pause and ask the treating clinic to reconcile them; do not choose the instruction that seems easiest.

1. State the suspected lymphoma site and the diagnostic questions still unanswered.
2. List every recent corticosteroid and other immune-modifying medicine with dates.
3. Ask whether fine-needle aspiration, biopsy, flow cytometry, clonality, or imaging should occur before a new treatment when safe.
4. Discuss the clinical risk of waiting versus the diagnostic value of sampling first.
5. If treatment must start, document the reason and collect feasible samples beforehand without delaying stabilization.
6. Leave with written medication instructions, result plan, and what changes require emergency care.

Node or mass change, breathing, swallowing, appetite, thirst, urination, panting, vomiting, stool, weakness, infection signs, neurologic function, and all medication effects. Rapid shrinkage after medication is not by itself a definitive diagnosis. Write observations in neutral terms with date and time. A home log supports clinical decisions but does not authorize a medication change or replace examination, laboratory testing, imaging, or emergency triage.

Call for medication questions, marked thirst or urination, vomiting, black stool, infection concern, or worsening original signs. Emergency care is appropriate for breathing difficulty, collapse, severe weakness, inability to urinate, prolonged seizures, or rapid neurologic decline. When urgent transport is advised, bring the current medication list and call ahead if that does not delay departure.