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Association and impact of patellofemoral dysplasia on patellofemoral arthropathy and arthroplasty.
[trochlear dysplasia]
The
association
of
patellar
and
trochlear
anomalies
resulting
in
isolated
patellofemoral
osteoarthritis
has
often
been
postulated
but
rarely
studied
.
The
purpose
of
this
study
was
to
examine
the
association
of
patellofemoral
dysplasia
,
specifically
trochlear
anomalies
,
which
are
a
cause
for
degenerative
disease
and
may
result
in
a
worse
outcome
after
arthroplasty
for
isolated
patellofemoral
arthritis
.
Eighteen
consecutive
patients
who
underwent
robotic
image-based
patellofemoral
arthroplasty
were
compared
with
an
age
and
sex-matched
group
of
patients
who
underwent
medial
unicompartmental
arthroplasty
using
the
same
image-based
navigation
system
and
had
no
patellofemoral
,
lateral
disease
or
malalignment
.
The
compared
parameters
were
the
patellofemoral-trochlear
angle
and
Dejour
score
in
the
preoperative
radiographs
and
patellofemoral-trochlear
angle
and
internal
rotation
of
the
trochlea
compared
to
the
intercondylar
line
in
the
proximal
,
middle
and
distal
trochlea
.
Significantly
higher
rates
of
patella
alta
(
T
=
5
,
P
=
0
.
0001
)
and
trochlear
dysplasia
(
6
%
vs
.
55
%
)
were
found
,
as
manifested
by
an
increase
in
the
trochlear
angle
and
Dejour
score
.
Furthermore
,
the
trochlea
was
found
to
have
a
higher
degree
of
internal
rotation
in
patients
with
isolated
patellofemoral
arthritis
compared
to
the
control
group
.
In
conclusion
,
patellofemoral
anomalies
such
as
patella
alta
and
trochlear
dysplasia
are
present
in
association
with
isolated
patellofemoral
arthritis
.
Isolated
patellofemoral
arthritis
is
also
associated
with
higher
rates
of
trochlear
internal
rotation
.
Correction
of
this
internal
rotation
is
essential
in
the
success
of
arthroplasty
in
patients
with
patellofemoral
disease
.
Level
III
study
,
It
is
a
case
control
study
.
Diseases
Validation
Diseases presenting
"arthritis"
symptom
acute rheumatic fever
child syndrome
congenital adrenal hyperplasia
cystinuria
familial hypocalciuric hypercalcemia
familial mediterranean fever
focal myositis
harlequin ichthyosis
homocystinuria without methylmalonic aciduria
inclusion body myositis
lamellar ichthyosis
malignant atrophic papulosis
pyomyositis
sneddon syndrome
trochlear dysplasia
typhoid
wiskott-aldrich syndrome
This symptom has already been validated