Spinal cord stimulation may reduce lumbar radiculopathy in the setting of metastatic colon cancer

TL;DR

Spinal cord stimulation significantly reduced pain and improved mobility in a patient with metastatic colon cancer causing severe nerve pain.

Contribution

This is the first reported use of spinal cord stimulation for refractory pain from metastatic colon cancer-induced radiculopathy.

Findings

The patient achieved over 80% pain relief after spinal cord stimulation trial.

Spinal cord stimulation reduced opioid use and restored ambulatory function.

The patient maintained functional improvement after permanent implantation.

Abstract

Cancer pain has a substantial impact on the quality of life and functional capacity with a prevalence of up to 70 % in patients with advanced, metastatic, or terminal disease [1]. The WHO pain ladder has been used in practice to guide cancer pain management. A three-step ladder starts with NSAIDs and non-opioids for mild pain, weak opioids for mild to moderate pain and strong opioids for moderate to severe pain with the use of adjuvant medications such as TCAs and muscle relaxants at any stage for optimization (Fallon et al., Dec 2022) [2]

We present a case of a patient with metastatic colon cancer who was admitted for intractable pain crisis and right sided L-5 radiculopathy secondary to epidural metastasis (Figs. 1 and 2). The patient's pain left her bedridden, unable to walk and remained refractory to an escalating intravenous opioid regimen and caudal epidural steroids. The patient subsequently underwent spinal cord stimulation (SCS) trial at level T-7 and achieved >80 % pain relief resulting in a markedly decreased opioid requirement and tremendous recovery of ambulatory function (Fig. 3). After sustained results, a permanent implant was placed at T-8 and patient remains discharged with functional restoration and continued pain improvement (Fig. 4).

To our knowledge, this is a novel application of SCS for a refractory pain crisis secondary to a metastatic colon cancer induced radiculopathy presenting with severe functional impairment. As we transition away from opioid use, it is imperative as pain physicians, to investigate the potential of current as an alternative means of cancer pain management: a ubiquitous and challenging clinical conundrum.

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