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Differential Diagnosis For Back Pain, Cramping in Extremities
- Infectious Disorders (Specific Agent)

CFS/Fibromyalgia/Chronic fatigue syndrome
Tetanus- Granulomatous, Inflammatory Disorders

Pancreatitis, acute- Allergic, Collagen, Auto-Immune Disorders

Fibromyositis/Fibromyalgia syndrome
Polymyalgia rheumatica- Metabolic, Storage Disorders

Porphyria, acute intermittent
Xanthinuria- Anatomic, Foreign Body, Structural Disorders

Hematomyelia- Functional, Physiologic Variant Disorders

Stress/Emotional/Physical- Vegetative, Autonomic, Endocrine Disorders

Addison's disease (chronic adrenal ins)
Adrenocorticoid (Isolated) Deficiency- Reference to Organ System

Renal Failure Acute- Poisoning (Specific Agent)

Diethylene Glycol poisoning
Ethylene glycol [Antifreeze] ingestion