Page Index: Tips | Anatomy |Joint effusion|
Tips:
Check for joint effusion
1 Medial femoral condyle. 2 Tibial spine. 3 Femorotibial joint - Medial compartment. 4 Tibia. 5 Fibula. 6 Fibular head. 7 Proximal tibiofibular joint. 8 Femorotibial joint - Lateral compartment. 9 Lateral femoral condyle. 10 Patella. 11 Femur. 12 Fabella. 13 Tibial tuberosity. 14 Femoropatellar joint. 15 Medial patellar joint. 16 Lateral patellar joint.
10 Patella. 15 Medial patellar joint. 16 Lateral patellar joint.
1 Medial femoral condyle. 2 Tibial spine. 3 Femorotibial joint - Medial compartment. 4 Tibia. 5 Fibula. 6 Fibular head. 7 Proximal tibiofibular joint. 8 Femorotibial joint - Lateral compartment. 9 Lateral femoral condyle. 10 Patella. 11 Femur. 12 Fabella. 13 Tibial tuberosity. 14 Femoropatellar joint. 15 Medial patellar joint. 16 Lateral patellar joint.
Typical osteoarthritis with cartilage loss on the medial side, subchondral sclerosis and osteophytes.
There is uniform cartilage loss.
There are no osteophytes.
In such a case your first thought should be inflammatory joint disease.
Chondrocalcinosis of the knee, with prominent calcification of the menisci.
Extensive degenerative changes, chondrocalcinosis in both menisci, predominant patellofemoral joint osteoarthritis, and calcification of the gastrocnemius tendon origin.
Calcium pyrophosphate dihydrate deposition (CPPD) disease, also known as pyrophosphate arthropathy or pseudogout, is defined by the co-occurrence of arthritis with evidence of CPPD deposition within the articular cartilage.
The terminology regarding CPPD disease has been confusing, with chondrocalcinosis, CPPD, and pseudogout often used synonymously. Indeed, although initially described as chondrocalcinosis articularis, it is now understood that imaging findings of chondrocalcinosis do not always indicate CPPD disease
A: distance from the inferior margin of the patellar articular surface (as opposed to the lower pole of the patella itself) to the patellar tendon insertion
B: length of the patellar articular surface
Interpretation
normal: 1.25 (range 1.2-2.1) 2
patella alta: >2