Deep and superficial infrapatellar bursae: cadaveric investigation of regional anatomy using magnetic resonance after ultrasound-guided bursography.
OBJECTIVE
To demonstrate the anatomy of the deep and superficial infrapatellar bursae using magnetic resonance (MR) imaging and anatomic correlation in cadavers.


METHODS
MR imaging of the infrapatellar bursae of nine cadaveric knees was performed after ultrasound-guided bursography. The images were compared with those seen on anatomic sectioning. Histologic analysis was obtained in two specimens.


RESULTS
The deep infrapatellar bursa (DIB) was visualized in all specimens (n=9) and the superficial infrapatellar bursa (SIB) in five specimens (55%). The mean dimensions of the DIB in the craniocaudal, mediolateral, and anteroposterior planes were respectively 25, 28.7, and 6 mm, and for SIB 19.5, 21.2 and 2.2 mm. A fat apron dividing the DIB was depicted in eight knees (89%). Lateral extension of the DIB beyond the patellar tendon was observed in 100% of cases. Cadaveric analysis depicted a thin septum in the SIB in four of five cases (80%).


CONCLUSIONS
The DIB is generally present and extends beyond the lateral margin of the patellar tendon. A fat apron partially separating this structure is usual. The SIB is not an unusual finding and may have a septum separating its compartments.
Viegas
Flavio C
FC
Veterans Affairs Medical Center - San Diego, 3350 La Jolla Village Drive, San Diego, CA 92161, USA.
Aguiar
Rodrigo O C
RO
Gasparetto
Emerson
E
Marchiori
Edson
E
Trudell
Debbie J
DJ
Haghighi
Parviz
P
Resnick
Donald
D
D000368:Aged; D000369:Aged, 80 and over; D001175:Arthrography; D002061:Bursa, Synovial / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D002102:Cadaver; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007719:Knee Joint; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D017847:Patellar Ligament / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D015203:Reproducibility of Results; D014463:Ultrasonography
D003287:Contrast Media