Insufficiency fracture. A survey of 60 cases and review of the literature.
We report findings on the site, risk factors and imaging of insufficiency fractures (IF) in 60 patients admitted to our department between 1989 and 1997.


RESULTS
Fifty-five women (mean age 72.5 years) and five men (mean age 59 years) had 91 fractures, accounting for 0.32% of admissions. Fractures occurred most commonly in the pelvic girdle (30.7%, 28/91) and in the sacrum (29.6%, 27/91). In eight patients fractures of the sacrum were associated with fractures of the pelvic girdle. The next most common sites of occurrence were the tibia (16.5%, 15/91: 11 transverse, four longitudinal) and the femoral neck (9.9%, 9/91). There were three subchondral fractures of the femoral head, three fractures of the femoral diaphysis (two longitudinal, one transversal), two of the astragalus, and one each of the ilium, perone, calcaneum and sternum. Thirty patients had osteoporosis: six had received fluoride treatment and five had corticosteroids. Other risk factors were rheumatoid arthritis (4), osteomalacia (4), corticosteroid treatment (4), and hyperparathyroidism (1). Radiography showed a fracture line or osteocondensation in 65% (39/60) of cases. Scintigraphy was positive in 87.5% of cases (21/24), showing a fracture line (15) or a callus (6). Bone computed tomography (CT) scan was positive in 98.1% (54/55) of cases. IF occurs in elderly women with osteoporosis and most commonly in the pelvis.


CONCLUSIONS
Since radiologic signs are inconstant, scintigraphy is the choice procedure.
Soubrier
Martin
M
Rheumatology department, CHU Gabriel Montpied, BP 69, 63003 cedex 1, Clermont-Ferrand, France. msoubrier@chu-clermontferrand.fr
Dubost
Jean-Jacques
JJ
Boisgard
Stephane
S
Sauvezie
Bernard
B
Gaillard
Pierre
P
Michel
Jean Luc
JL
Ristori
Jean Michel
JM
D000368:Aged; D003952:Diagnostic Imaging; D005260:Female; D015775:Fractures, Stress / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000150:complications; D011877:Radionuclide Imaging; D012189:Retrospective Studies; D012307:Risk Factors; D014057:Tomography, X-Ray Computed