Limb-Length Discrepancy
Also written as: LLD — Limb-Length Discrepancy
A measurable difference in the length of paired limbs, most commonly the lower extremities, which may be addressed through orthotic heel lifts or shoe modifications.
Full Definition
Limb-length discrepancy (LLD) refers to a significant inequality in the length of corresponding limbs, typically quantified in centimetres via clinical measurement or scanography. In orthotics documentation it is one of the primary indications for heel lifts and shoe raises. Editors must ensure that quantitative values are expressed consistently (millimetres vs. centimetres) throughout a document and that the laterality (right vs. left) is unambiguous. The abbreviation LLD appears frequently in referral letters and fabrication orders.
Usage
Usage note: Hyphenate as a compound modifier before a noun ('limb-length discrepancy'), and confirm whether the discrepancy is structural or functional, as these require different interventions.
In Context
- "A limb-length discrepancy of 1.5 cm was noted on scanography and addressed with a full-length shoe raise on the left." — Orthotics fabrication order
- "The editor flagged that 'limb-length discrepancy' and 'functional leg-length discrepancy' were used interchangeably in the report, which may mislead the reader." — Clinical report copy-edit