Ferrill: LE MSK DSA Flashcards
Growth Centers appear:
Femoral Condyle: 39 wks
fetal age
Tibial Plateau: Birth
Femoral head: 4 months
Gr. Troch: 4-6 yrs
Iliac Crest: 11-14 years
Ischial Tub: 13-15 yrs
Centers close/Growth
Complete:
Iliac Crest: 20 years
Ischial Tub: 16-18 yrs
Femoral head: 16-18 years
Gr. Troch: 16-17 years
Femoral Condyle: 16-19 years
Tibial Plateau: 16-19 years
Common Orthopedic Problems of the Lower Extremities
Hip Dysplasia Legg- Calvé Perthes Disease Slipped Capital Femoral Epiphysis Osgood-Schlatter Disease Intoeing Metatarsus Adductus Pes Planus (rigid vs. functional)
Evaluation of lower extremity
Static visual inspection
Line and shape of legs
- Genu valgum/varus (minimal varus is normal in children <2)
- Muscular tone and power
Symmetry and shape of joints and folds
- Gluteal and popliteal folds
The weight bearing foot
- Flat feet normal in children until ~3y/o
- Look at lateral curve of foot
Gait evaluation
- In-toeing
- Out-toeing
- Arm swing
- – High guard-> middle guard->low guard
- normal adult gait mechanics not achieved until 5-6 y/o
Symmetry and ability
- Range of motion-global active and passive
- – SIJ, Hip, knee, ankle, foot
- – Quality and quantity
Joint evaluation
- Warmth, effusion, skin color
Muscles
- Tone, activity, firing patterns
Normal pediatric Pelvis XR
Presence and shape of 3 innominate bones:
Cortical lines
Density
Growth centers:
Bilateral presence according to age
Growth plates
- Presence and symmetry
The hip problems
Congenital dysplasia of the hip (DDH)
Legg-Calve Perthes Disease
Slipped Capital Femoral Epiphysis (SCFE)
Developmental Dysplasia of the Hip (DDH)
Signs and symptoms:
- asymptomatic,
- decreased ROM hip; difficulty w/ diaper change; delayed crawling, standing, walking; gait asymmetry
Early detection before 6mo old-best outcome
Exam:
Ortalani and Barlow
Requires XR if positive or high suspicion
Treatment of DDH
Diagnosed at birth, DDH will reduce and stabilize with a brace (or double diapers!)
Open reduction is needed in some later diagnoses.
Diff:
- CP; other neurologic disorder
- Congenital coxa vara (decreased abduction with decreased femoral neck-shaft angle)
- Fracture
Etiology: utero rigid dislocation, perinatal hip dislocation, or ligament laxity or neuromuscular issues from CP or meningomyelocyle
The result of missed DDH diagnosis as a child is
a misshapen acetabulum in the adult, e.g.flattened superior border of the right acetabulum
This sets the joint up for mechanical and orthopedic problems, including arthritis, during adult life. So, included in your differential diagnosis for the adult with early hip problems should include DDH.
Legg-Calvé-Perthes Disease
A form of aseptic necrosis of femoral head 2-12 years old Usually 4-8 years Boys: Girls 4:1 Aching groin or proximal thigh Worse at the end of the day Antalgic gait X-ray: narrowed and irregular epiphysis
avascular necrosis on xray looks like…
Note the mottled appearance of the left femoral head as a result of avascular necrosis.
Slipped Capital Femoral Epiphysis
Orientation of physis changes in adolescence (horizontal to more oblique)
Increased body size is a risk factor
Ages 10-16
Pain and antalgic gait
- sudden onset or insidious
Decreased physical activity
Bilateral in 40-50% of patients
What SCFE looks like on x-ray
“fallen ice cream scoop” look of the femoral head (epiphysis). This is the epiphysis literally slipping off the femoral neck.
Osgood-Schlatter Disease
Most common pediatric overuse syndrome May be benign, self-limiting Girls: 8-13 yo Boys: 10-15 yo May occur after getting kicked in soccer 20% of all young athletes 20% of cases are bilateral
Repetitive, tensile forces on developing tibial tubercle resulting in microtrauma and avulsion
Osgood Schlatter Presentation
Pain over tibial tubercle with activity, especially eccentric contraction of quadriceps.
Tenderness and swelling over tubercle.
Type I - soft tissue swelling only
Type II – Xray evidence of fragmentation
