Cancer Survivor Replaced High-Dose Opioids With Medical Cannabis for Pain | Research

The takeaway

A 27-year-old Ewing sarcoma survivor with intractable pain completely replaced high-dose opioids with THC-rich cannabis within 4 weeks, maintaining pain control and unexpectedly resolving a chronic infection over 9 months.

Cancer patients with chronic pain, oncologists, pain management specialists, and anyone interested in cannabis-opioid substitution.

What the researchers found

After initiating THC-rich cannabis (Bedrocan, 22% THC, 1% CBD, 1g/day), the patient's pain dropped from VAS 9-10 to VAS 2-3. Complete opioid discontinuation occurred within 4 weeks (from 120mg/day morphine equivalents). Over 9 months, a chronic draining fistula closed completely and CRP dropped from 9.6 to 2.3 mg/dL.

Why it matters

This case demonstrates that medical cannabis may enable opioid-free pain management in complex cancer cases. The unexpected resolution of chronic infection and inflammation raises intriguing questions about cannabinoid immunomodulatory effects beyond pain relief.

The numbers in context

Pain: VAS 9-10 → VAS 2-3. Opioids: 120mg/day morphine equivalents → 0 within 4 weeks. CRP: 9.6 → 2.3 mg/dL. Cannabis: Bedrocan 22% THC, 1% CBD, 1g/day. Follow-up: 9 months. Chronic fistula: complete closure. No adverse effects reported.

How the study worked

Single case report of a 27-year-old male long-term Ewing sarcoma survivor with chronic multi-drug resistant periprosthetic osteomyelitis. Supervised medical cannabis therapy initiated after refusing amputation. 9-month follow-up tracking pain, opioid use, inflammation markers, and fistula status.

What this study cannot tell us

Single case report — cannot prove causation. Spontaneous improvement cannot be excluded. No blinding or control. The patient's strong belief in cannabis may contribute to pain improvement (placebo effect). Infection resolution may be coincidental.

How to read the evidence

Single case report — the most dramatic outcome possible but cannot establish causation or generalize to other patients.

When this study was published

Published in 2026, reporting treatment initiated in January 2025 with 9 months of follow-up.

The bigger picture

The opioid crisis makes alternatives for cancer pain urgent. This case is remarkable not just for opioid replacement but for the apparent anti-inflammatory effect — the resolution of a chronic multi-drug-resistant infection that had persisted for over a decade is unexpected and warrants investigation.

Questions still open

Can THC-rich cannabis consistently replace opioids in cancer pain? Did cannabis truly contribute to infection resolution, or was it coincidental? Should controlled trials investigate cannabinoid immunomodulation in chronic infections?

Common questions

Can medical cannabis replace opioids for cancer pain?

In this single case, yes — a patient with severe cancer-related pain completely stopped opioids within 4 weeks of starting medical cannabis. However, one case can't prove this would work broadly, and controlled trials are needed.

Did cannabis help with the infection too?

The timing is suggestive — a chronic draining infection that persisted for years resolved after cannabis initiation, with inflammation markers dropping. However, this could be coincidental, and the authors cannot establish causation from one case.

Read the original research

Ewing sarcoma-related pain: potential role of medical cannabis monotherapy in symptom management - a case report.

Journal of cannabis research, 8(1), 21

View on PubMed ↗Publisher’s paper ↗

Citation

De Virgilio Suglia, Cesare; Spaccavento, Felice Antonio; Turco, Fabio; De Trizio, Angela; Giannuzzi, Rossella; Tafuri, Silvio. (2026). Ewing sarcoma-related pain: potential role of medical cannabis monotherapy in symptom management - a case report.. Journal of cannabis research, 8(1), 21. https://doi.org/10.1186/s42238-026-00388-x