Decision support, not a diagnosis. Correlate every finding with a licensed clinician and the full clinical picture.

Knowledge graph

89 nodes · five injuries · four modalities

Walk region to injury to grade, then imaging findings, clinical tests, treatment, and return-to-play. This is the same graph the workspace matcher uses.

ACL Partial Tear (MRI)Lachman TestAnterior Drawer Test (Conservative PT (ACL PKneeACL TearMeniscus Tear

ACL Tear

Anterior Cruciate Ligament

Partial

Conservative

Imaging

  • ACL Partial Tear (MRI)Thinned/attenuated fibers, increased intrasubstance T2 signal, intact but lax fibers

Tests

  • Lachman TestSn 85% · Sp 94%
  • Anterior Drawer Test (Knee)Sn 70% · Sp 90%
  • Pivot Shift TestSn 32% · Sp 98%

Treatment

  • Conservative PT (ACL Partial Tear)Bracing + structured physical therapy: quadriceps/hamstring strengthening, proprioception training, activity modification

RTP · ACL Partial Tear RTP (Conservative)

12wtypical 18w24w

Complete

Surgical

Imaging

  • ACL Complete Tear (MRI)Fiber discontinuity, empty notch sign, bone bruising (lateral femoral condyle + posterolateral tibial plateau), Segond fracture

Tests

  • Lachman TestSn 85% · Sp 94%
  • Anterior Drawer Test (Knee)Sn 70% · Sp 90%
  • Pivot Shift TestSn 32% · Sp 98%
  • Lever Sign TestSn 83% · Sp 80%

Treatment

  • ACL Reconstruction (ACLR)Arthroscopic reconstruction using BPTB, hamstring, or quadriceps tendon autograft

RTP · ACL Reconstruction RTP

36wtypical 44w52w

Shared principles

Grade-Treatment-RTP Cascade

Across ALL injuries: Low Grade → Conservative Treatment → Short RTP (weeks); High Grade → Surgical Consideration → Long RTP (months). Imaging grade IS the primary RTP predictor.

Conservative-First Principle

Grade I-II across ALL injuries: conservative treatment first. Exceptions: elite athletes (ACL), complete avulsions (hamstring G4), full-thickness RCT in young patients → early surgery considered.

Test Cluster + Imaging = Decision Confidence

No single test suffices. Gold standard = [Clinical Test Cluster] + [Imaging Finding] = [Treatment Decision]. Combining 2-3 tests yields significantly higher accuracy than any single test or imaging alone.

RTP ≠ Calendar Date; RTP = Functional Testing

All injuries: RTP requires passing FUNCTIONAL TESTS. Criteria: strength symmetry ≥90%, no pain, sport-specific drills passed, psychological readiness (ACL-RSI for ACL).

Recurrence Risk Window

Hamstring: ~30% recurrence, highest in first 2 weeks post-RTP. ACL: highest re-tear risk in first 12 months. Ankle: ~30% recurrence within 1 year if proprioception not restored. Universal: inadequate rehab → premature RTP → recurrence.