Please select the eligibility criteria that correspond to the clinical trial below.
Title: Spinal Cord Stimulation System in the Treatment of Chronic Pain
Brief Summary: The purpose of this study is to evaluate the efficacy and safety of spinal cord stimulation (SCS) using the PINS spinal cord stimulator device for chronic and intractable pain.


Options:
A: Inclusion Criteria:

* The patient must have SCS implanted for at least 2 months before study start date
* The patient must be at least 18 years old
* The patient must currently be receiving pain relief from SCS usage
* The patient must be willing to participate in a 9-week study
* The patient must have at least 20% of battery life remaining in his/her spinal cord stimulator
* The patient must be able to tolerate Vicodin-Extra Strength as well as Tylenol, but can also take their own pain medication if it is not one of the two mentioned

Exclusion Criteria:

* The patient is pregnant or intends to become pregnant during the course of the study.
* The patient by report, and/or by physician assessment, exhibits any or all of the following, which might bias reporting of treatment outcome:

A strong untreated dependency on prescription medication such as benzodiazepines and narcotic analgesics.

A strong potential for secondary gain issues.

A significant, untreated psychiatric comorbidity.

* The patient possesses a coexisting clinically relevant or disabling chronic pain problem not treated by SCS
* The patient has been diagnosed with unstable angina
* The patient receives a Karnofsky's performance score of \<60
B: Inclusion Criteria:

1. A diagnosis of primary or idiopathic erythromelalgia
2. Patients ≥18 years who have developed chronic pain that has remained refractory to medical treatment for ≥6 months.
3. Minimum pain intensity of 5/10 on a numeric rating scale NRS at baseline.
4. Successful two-week SCS testing period with tonic stimulation (≥2 points reduction in pain NRS from baseline). This means patients will experience paresthesia during the trial period of spinal cord stimulation.

Exclusion Criteria:

1. Coexisting conditions that would increase procedural risk (e.g., sepsis, coagulopathy).
2. History of laminectomy or posterior fusion at the thoracolumbar junction, where percutaneous electrode end tips are routinely placed.
3. Abnormal pain behavior and/or unresolved psychiatric illness.
4. Unresolved issues of secondary gain or inappropriate medication use.
5. Unfit for participation for any other reason as judged by the study physician.
C: Inclusion Criteria:

* Aged from 18 to 80 years
* Presence of FBSS ≥ 3 months after one or several spine surgery
* Presence of back and leg pain with documented neuropathic component (DN4)
* Having failed well conducted conservative treatment
* Meeting the criteria for a test of spinal cord stimulation as recommended by HAS (multidisciplinary consultation, psychological evaluation
* Presence of uni-or bilateral radicular pain with severe intensity, VAS score greater than or equal to 50/100 (daily VAS mean on 5 consecutive days).
* Presence of associated back pain, as related to type "bar" or "tender points"
* Understanding and accepting the constraints of the study
* Covered by a French Health Insurance plan or benefiting of such as a third party in agreement with the French law (Huriet law n°88.1138 and modifications) on biomedical research
* Has given written consent to the study after receiving clear information.
* Absence of psychosis or evolutionary history of severe psychosis requiring hospitalization.
* Absence of progressive malignancy

Exclusion Criteria:

* Age \< 18 and \> 80 years
* Accessible because of back pain surgery 'mechanical' causal (discogenic back pain, spinal instability, spinal deformation)
* Presence of surgery, anesthetic and psychiatric contraindication for spinal cord stimulation system implantation
* Absence of informed consent signature
* Women of childbearing without effective contraception (hormonal / mechanical: oral, injectable, transdermal, implantable, intrauterine device or surgical: tubal ligation, hysterectomy, oophorectomy total) or breastfeeding.
* Subject not covered by a French Health Insurance plan or not benefiting of such as a third party
* Subject receiving enhanced protection: minors, pregnant women, nursing women, persons deprived of liberty by a judicial or administrative decision, adults under legal protection, and finally patients in emergency situations.
D: Inclusion Criteria:

1. Have been diagnosed with chronic, intractable pain of the trunk and/or limbs which has been refractory to conservative therapy for a minimum of 3 months.
2. VAS ≥ 5
3. Be 18 years of age or older at the time of enrollment
4. Be willing and able to comply with study-related requirements, procedures, and visits
5. Be willing and capable of giving informed consent

Exclusion Criteria:

1. Pregnancy or potential for with unwillingness to use contraception
2. Have a current diagnosis of a coagulation disorder, bleeding diathesis
3. Have evidence of psychiatric or cognitive disorder, who are unable to cooperate with surgery and program control
4. Have a life expectancy of less than 1 year
5. Have a condition currently requiring or likely to require the use of diathermy
6. Other inappropriate situations determined by the researcher

Answer: D