Disorders of the Knee
Dr. Wahby GhalibFJMC, CABO, MRCS
Genu varum & valgum
Genu varum = bow legGenu valgum = knock knee
On standingGenu varum : intercondylar distance > 6 cm
Genu valgum : intermalleolar distance > 8 cmCauses
Physiologic : varum in 1 yr childvalgum in 4 yr child
Rickets
Trauma
Skeletal dysplasia
Blount`s diseaseO.A.
R.A.Rx
Physiologic : follow up
Rickets : vit D
HemiepiphysiodesisOsteotomy
9Meniscal injuries
Functions
Improve stability
Load distribution
Increase range of motionProprioception
Pathology
Medial meniscus is less mobile more liable for injuryMost of the meniscus is avascular : tear not capable of healing except the lateral third
Meniscal tear mechanical irritation synovitis & later O.A.
Trauma
Axial loading + flexion + rotationTypes of meniscal tear
Vertical longitudinalBucket – handle
TransverseOblique
Horizontal cleavage : degenerativeC / F
PainGiving way
LockingSwelling : 24 hrs after trauma
O / ETenderness
Fluid inside the joint
Mc Murray testDx
XR : normal
MRI
Arthroscopy
DDx
Locking : Loose bodies
Giving way : ACL injury
Patellar instabilityMx
Back slab 3-4 w
Cruches
Quadriceps exercises
Surgery : repair or partial meniscectomy
Total meniscectomy O.A.Chondromalacia patellae
C / FFemale
Knee pain
Friction testAetiology
Incongruence of patellofemoral jointMalalignment of the extensor mechanism
Muscle weaknessLigament laxity
Congruence: sulcus and congruence angles
Alignment: Q angle
Pathology
Articular cartilage : softening & fibrillationSubchondral bone : congested
RxAnalgesia
Physiotherapy
Surgery
Loose bodiesTrauma
O.A.
Osteochondritis dissecansCharcot arthropathy
Synovial chondromatosisCharcot arthropathy
Due to neuropathyJoint swelling, deformity, instability, & loose bodies
Pain is unusualRx : splint , arthrodesis
Prepatellar bursitis (housemaid`s knee )Infrapatellar bursitis (clergyman`s knee)Due to kneeling
Rx : avoid kneelingfirm bandaging
aspiration
excision
Semimembranosus bursa
Swelling in medial side of popliteal fossaRx : if painful : excision
Baker`s cyst
It is a bulge from posterior capsule with synovial herniationR.A., O.A., T.B.
Rx : causeaspiration & steroid injection
excision
Osgood - Schlatter disease
Tractional osteochondritis of tibial tubercleAdolescent
Pain & swellingXR : fragmentation
Rx : rest ± back slabThank you