Residual limb pain is not a diagnosis: a proposed algorithm to classify postamputation pain

Area of Science:

• Pain Medicine
• Surgical Outcomes
• Neurology

Background:

• Postamputation pain (PAP) syndromes have historical descriptions but lack a defined taxonomy.
• Current terms like Residual Limb Pain (RLP) do not differentiate specific conditions (neuroma, CRPS, somatic pathology).
• Phantom Limb Pain (PLP) is often conflated with other PAP syndromes despite being distinct.

Purpose of the Study:

• To systematically review the literature on postamputation pain states.
• To assess the degree of diagnostic delineation and criteria used for various PAP syndromes.
• To evaluate the efficacy of reported treatment modalities for PAP.

Main Methods:

• Conducted a systematic literature review of 151 papers on postamputation pain.
• Identified studies detailing diagnostic criteria and treatment modalities for PAP syndromes.
• Focused on the clarity of diagnostic categories for RLP and PLP.

Main Results:

• No reviewed papers provided further categorization of RLP into specific diagnostic criteria.
• The literature is dominated by case reports and underpowered studies, with few high-quality randomized controlled trials.
• Inconsistent assessment tools and diagnostic categories likely contribute to reported variations in PAP incidence.

Conclusions:

• Clear definitions of distinct clinical entities are essential for developing optimal treatments for postamputation pain.
• Proposed an algorithm for uniform classification of PAP syndromes.
• Standardized diagnostic categories are needed to accurately assess the prevalence and guide treatment of PAP.