IncobotulinumtoxinA for Treatment of Focal Cancer Pain After Surgery and/or Radiation

Inclusion Criteria: * Subjects 18- 80 years, both sexes, all races and ethnic groups. * Diagnosis of post- surgical/post - radiation cancer pain. * Focal pain duration longer than 3 months * Pain of moderate to severe intensity ( mean VAS over the previous week \>4 ) * Subjects who are able to read, speak, and understand English. Exclusion Criteria: * Existing significant acute medical condition (i.e. cardiovascular, endocrine, hematologic, neoplastic, infectious, or autoimmune disorders). * Pregnancy or planned pregnancy (determined by urine pregnancy test). Women of childbearing age should use a reliable mode of contraception during the study period (abstinence, etc). * Active breast feeding. * Enrollment in any clinical trial (currently or within the past 3 months) in which treatments are imposed by a protocol. * Any subject for whom botulinum toxin treatment would be contraindicated; known allergy or sensitivity to medication. * Subjects who are younger than 18 years of age. * Neuromuscular-junction disorders. * Axis I diagnosis determined by a neurologist or psychiatrist. * Use of anesthetic medications within two weeks or corticosteroid injections within 4 weeks of enrollment. * Received botulinum toxin injections in the past 4 months. * Patients taking high doses of aminoglycosides or other drugs affecting the function of neuromuscular junction ( anticholinergic, muscle relaxants) * Patients who have unstable pain in/at sites other than areas of planned injection