- Trochlear groove - assess on sag.
- Meniscofemoral and meniscotibial (coronary) recesses.
- Horizontal tear - must extend to apex (sag).
- Flap tear - one type that looks horizontal but extends short of apex creating small inferior leaf.
- Flap tear -- vertical configuration, but inner 1/3 (sag).
- Vertical/longitudinal tear - outer 1/3 (sag).
- Menisco-capsular separation -- two scenarios
- ACL with tear of periph of post. horn lat. meniscus (fluid betw. capsule and periph. of post. horn).
- MCL tear with meniscotibial lig. tear.
- Posterolat. corner -- review on sag and axial.
- SONK -- almost all cases are probably insufficiency fractures
- CMP - MRI adaptation of Outerbridge classification; describe rather than classify; ICRS classification.
- MPFL - slice above proximal origin of MCL, tears at femur
- Patella tendinosis - best on GRE.
Sunday, April 17, 2011
Pearls from Stoller Macau April 2011 - 3. Knee
Pearls from Stoller Macau April 2011 - 2.Shoulder
- Anterior band of IGHL can have high attachment -- 3rd structure on axial (in addition to labrum and MGHL).
- Sublabral foramen (antero-superior); sublabral sulcus (superior)
- Hill-Sachs - position - where articular cartilage in NOT; at level of footprint on axial (1st two slices).
- MGHL - "squiggly" on Sag.
- Patterns of glenoid sclerosis.
- Anteroinferior labrum -- assess 1st -- spectrum of injury
- Perthes - labral tear, minimal displacement, intact periosteum
- ALPSA - labral tear and medial displacement of IGLLC, medially stripped but intact periosteum (NB POLPSA)
- GLAD - labral tear (partial), no detachment, chondral defect, intact periosteum
- Bankart - avulsion of IGLLC (anterior and medial), disruption of scapula perisoteum
- SGHL/CHL -- "Biceps pulley" -- look on Sag
- HAGL -- anterior band IGHL tear (+BHAGL) aot RHAGL or PHAGL -- post. band
- GAGL
- "Wave Sign" -- massive RC tear - repairable acute tear without scarring
Pearls from Stoller Macau April 2011 - 1.Technique
- Zoom in to see detail.
- Every series should contain a plain T1.
- GRE/T2* -- for shoulders and knee at least -- useful for chondrocalcinosis, PVNS, blood
- Hip -- should include sag
- Hip - one large FOV series
- Ankle -- NB ant. process of calcaneus and lateral process of talus
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