POSTER ABSTRACTS - ISAKOS

preoperative magnetic resonance, and were
included in the study. The average age was 34,8
years old. Artroscopy was indicated because: ACL
rupture =74, MML=55,LML=30,
MML+LML=6,PFD=11 and others= 14. The
osteochondral lesions were evaluated using a
protocol, that included: the radiologist report,
intra-operative finding and the elected treatment.
The lesions were classified using the ICRS score
and the Outerbridge classification.
Results.- In 82 of the 190 arthroscopies (43.16%)
the presence of a chondral / osteochondral lesion
was observed. An unique lesion was observed in
59 cases ( 72%%). Twenty six (23) patients
presented multiples lesions ( 28,1%). The
magnetic resonance was positive for chondral
lesions in only 37 of the 82 cases(45%). There were
no false positives.
Of a total of 115 chondral / osteochondral lesions
; 58 were classified as III and IV grade of
Outerbridge and 57 as a grade I and II. Using the
ICRS classification, 59 resulted being III and IV
grade of ICRS, ( IIIA=32, IIIB=10, IIIC= 1, IIID=2,
IVA=13,IVB=1) and 56 grade I y II
(IA=14,IB=2,II=40).
With respect to the size of the lesion: 26 of them
represented an area < 1 cm2, 54 in-between 1-2
cm2, and 35 > 2 cm2.
In 86/115 a therapeutic arthroscopic procedure
was necessary. (Radio frequency ablation= 63,
micro fracture= 34, artrhoscopic debridement and
abrasion= 16, OATS= 2).
Discussion. The high prevalence of chondral and
osteochondral lesions observed in during knee
arthroscopic surgery is remarkable (43,6%).
Magnetic resonance still present a low diagnostic
sensibility (45%), however a high specificity was
observed (100%) .
In 55% of the cases the chondral lesion was
diagnosed intraoperatively, which enhances the
importance of diagnostic arthroscopy and having
a clear intraoperative decission making diagram.
The direct correlation between age and size of the
defect suggests an articular degenerative process
with aging.
E-poster #753
Bilateral Discoid Medial Menisci: A Report of
Five Patients
Masahiro Ohnuma, Sendai, Miyagi, JAPAN,
Presenter
Takehiko Sugita, Sendai, Miyagi , JAPAN
Tomomaro Kawamata, Sendai, Miyagi, JAPAN
Jutaro Umehara, Omagari, Akita, JAPAN
Satsuki Onoda, Sendai, Miyagi Prefecture, JAPAN
Tohoku University Graduate School of medicine,
Sendai, JAPAN
Introduction:
Discoid medial meniscus is extremely rare. The
first discoid medial meniscus was described by
Cave and Staples in 1941. Since then
appoximately 50 patients have been reported.
Bilateral discoid medial menisci are rarer; only 16
patients have been reported.
This study presented the clinical outcomes of our
5 patients with 3 years follow-up.
Patients:
Five patients with bilateral discoid medial menisci
were treated at our hospital from 1997 to 2003.
They were 4 males and 1 female. Their average age
was 32 years and ranged from 16 to 47years. The
average follow- up period was 4 years and ranged
from 2 to 8 years. Patients were evaluated with
physical examination and X-ray at follow-up.
Results:
Chief complaint was pain on medial joint line in
all knees. Sudden onset of pain was experienced
in only one patient. There were restrictions of
ROM in 3 knees. Six knees had complete descoid
and the other four had incomplete. All patients
were asymptomatic at follow-up on examination.
On radiographs, 2 knees showed osteophyte
formation and other 4 knees showed the
narrowing of the medial joint spaces.
Summary:
Five bilatral discoid medial menisci were
presented.
Subjective and objective characteristic findings of
discoid medial menisci could not be clarified.
Four knees showed the narrowing of the medial
joint space less than three years after
meniscectomy.
Long-term follow-up is needed to clarify the
progression of degenerative changes after the
resection of discoid medial meniscus.
E-poster #754
Potential Healing of Meniscal Injury in the
Avascular Zone After Radiofrequency
Stimulation
James P Tasto, San Diego, CA, USA, Presenter
Kevin Paul Hansen, San Diego, CA USA
Sakae Sano, San Diego, CA USA
David Amiel, La Jolla, CA USA
UCSD, San Diego Sports and Arthroscopy
Fellowship, San Diego, CA, USA