An implantable intrathecal drug delivery system (IDDS) could be used for various malignant or non-malignant chronic pain [1]. Even though the IDDS insertion is an invasive procedure that makes a direct conduit into the central nervous system for analgesics delivery, the use of IDDS is increasingly popular because it is very effective in treating chronic intractable pain and is supported by multiple studies [2,3]. We report on the case of a patient who had a clear discharge from a suspected cerebral spinal fluid (CSF) leakage through a lumbar wound after intrathecal morphine pump removal surgery. It was an uncertain case of CSF leakage because the patient did not suffer from a headache. Finally, the clear discharge was successfully resolved by a single epidural blood patch.
CASE REPORTA 55 year-old man had a post herpetic neuralgia (PHN) affecting the right shoulder and arm for 10 years. He experienced piercing, severe burning pain (visual analogue scale[VAS] 8/10) that was not easily managed by various medications such as oxycodone, morphine, fentanyl transdermal patch, milnacipran, and pregabalin. Pain interventions such as stellate ganglion block, cervical epidural block, and brachial plexus block were performed multiple times. Those procedures only relieved his pain for a few brief moments.Eight years ago, a spinal cord stimulator was implanted on his cervical spinal cord area though it did not successfully relieve the pain (Fig. 1). An intrathecal morphine pump insertion was performed to control the intractable PHN. Other physical examination and laboratory results was unremarkable. His coagulation profiles were within the normal ranges.In the intrathecal morphine trial, his right arm pain was reduced to VAS 5/10 with the injection of 0.3 mg morphine sulfate into the L3-4 interspinous space. A permanent morphine pump was implanted two days later.