Lateral Patellar Compression Syndrome

Question 1

“Theatre sign” (anterior knee pain with sitting for long periods) is a/w with what?

Answer 1

Patellofemoral syndrome, lateral patellar compression syndrome

Question 2

Who is the ideal patient for a lateral retinacular release?

Answer 2

1) Anterior knee pain
2) No signs of patellar instability
3) Lateral patellar tilt

Question 3

What procedures are available for patellar realignment surgery?

Answer 3

1) Fulkerson (skeletally mature, no supermedial arthrosis)

2) Elmsie-Trillat (instability with lateral translation and lateral tilt)

Question 4

How is the TT-TG (tibial tubercle to trochlear groove) measured?

Answer 4

1) CT or MRI
2) Line drawn across posterior femoral condyles
3) Line perpendicular to posterior condylar line is drawn through trochlear groove
4) using same posterior condylar line as reference, perpendicular line drawn through tibial tubercle
5) distance btw perpendicular lines is measured
6) TT-TG> 20mm is indicator for medialization osteotomy