Dysport in Post-Surgical Neuralgia

Inclusion Criteria: * Male and female subjects aged between 18 and 75 years inclusive at the time of giving informed consent. * Subjects suffering from an area of chronic pain post-abdominal or thoracic surgery, chronic abdominal or thoracic scar pain. * Longitudinal axis of the pain area of 10 cm long maximum (as mapped upon screening). * Subjects with moderate to severe pain, i.e. spontaneous NRS score of 4-8 which has been stable for the previous month before screening. * Stable use of analgesics (or any medication impacting pain perception) during the month before screening and expected to be stable for the study duration. * Under stable medication regimen for other medication, i.e. during the month before screening. * Time from surgery which caused the painful scar more than six months and less than ten years at screening. * No other distracting pain either chronic or acute. * Female subjects of childbearing potential must have a negative urine pregnancy test result and be willing to use reliable contraceptive measures throughout study participation. * The subject's primary care physician has provided evidence which can be used to confirm that within the last 12 months of dosing that there is nothing in their medical history that would preclude their enrolment into a clinical study. Exclusion Criteria: * Previous treatment with Botulinum neurotoxin (BTX) (any serotype) during the past six months before screening. * History of hypersensitivity to any of the components of the Dysport formulation (which includes human serum albumin and lactose) or allergy to cow's milk protein. * Known hypersensitivity to lidocaine or other anaesthetics of the amide type, known hypersensitivity to hydroxybenzoates, complete heart block, hypovolaemia. * Any medical condition that may put the subject at risk with exposure to BTX, including diagnosed myasthenia gravis, Eaton-Lambert syndrome, amyotrophic lateral sclerosis, or any other disease that might interfere with neuromuscular function. * Opioid analgesic use at a Morphine Equivalent Dosage (MED) of \>75mg per day. * Neuroma in the scar pain area, diagnosed per ultrasound. * Use of agents that could interfere with neuromuscular transmission, including calcium channel blockers, penicillamine, aminoglycosides, lincosamides, polymixins, magnesium sulphate, anticholinesterases, succinylcholine and quinidine. * Need of any prohibited medication. * Any abnormal laboratory value, physical examination, vital signs, or electro…