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Ann Rheum Dis. 1998 November; 57(11): 676–681.
PMCID: PMC1752497

The faux profil (oblique view) of the hip in the standing position. Contribution to the evaluation of osteoarthritis of the adult hip


OBJECTIVE—The technique and results of a special oblique radiograph of the hip called the "faux profil" (FP) of the hip are described. The FP was evaluated for the detection of joint space narrowing in incipient osteoarthritis of the hip (OAH) as compared with the anteroposterior (AP) radiograph.
METHODS—58 hips with incipient osteoarthritis (joint space narrowing, 0-25% on the AP view) in 48 patients were identified among 200 consecutive patients fulfilling American College of Rheumatology criteria for OAH. Joint space narrowing was measured on the AP and FP radiographs of these 58 hips.
RESULTS—The FP view provides a true lateral projection of the femoral head and neck, and an oblique view of the acetabulum tangential to its superoanteromedial edge. On this view, the width of the anterosuperior and posteroinferior parts of the joint space can be measured and compared. Among the 58 hips with incipient OAH, 36 (62%) showed joint space narrowing on the AP view and 51 (91%) on the FP view. Among the 22 hips without joint space narrowing on the AP radiograph, 16 (72.7%) showed joint space narrowing on the FP view, involving the anterosuperior part of the joint in 11 cases and the posteroinferior part in five cases.
CONCLUSION—The FP view in the standing position should be used in incipient OAH as a complement to the AP view in patients with suspected OAH but no joint space narrowing on the AP radiograph. In this situation, nearly three quarters of hips in the study had joint space narrowing on the FP view, usually in the anterosuperior part and less often in the posteroinferior part of the joint.

Keywords: hip; radiographs; osteoarthritis

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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Figures and Tables

Figure 1
Diagram of the patient's position. (A) Position of the patient for an FP radiograph of the right hip. Axis of the foot (2nd metatarsus) should be parallel to the radiographic table. (B) For the left hip. (C) Cross sectional diagram of the pelvis showing: ...
Figure 2
Normal findings on the FP view. Radiograph and diagram. (1) Anteromedial edge of the acetabulum; (2) The superior part of the acetabulum appears as a sclerotic curved line ending at point A, which is the anterior extremity of the acetabular roof. The ...
Figure 3
Anteroposterior (A) and faux profil (B) views in incipient OAH. (A) In this 50 year old man with clinical OAH characterised by pain, minimal osteophytosis, and a supra-acetabular cyst, the anteroposterior view shows no JSN. JSN is visible only ...
Figure 4
Anteroposterior and FP views in incipient OAH. This 54 year old woman with painful left hip subsequently underwent total hip replacement. The pathologist confirmed the diagnosis of typical OA of the hip. (A) On the AP view, neither osteophytosis ...
Figure 5
Anteroposterior and faux profile views during arthrography. Incipient OA of the hip. This 58 year old woman had a one year history of pain in her left hip. (A) The AP view does not show cartilage thinning. (B) On the FP view, the width of the ...
Figure 6
FP view during arthrography. Normal hip.The anterosuperior part of the JS (especially the acetabular cartilage) is normally thicker (arrow) than its posterior part. Note the mild acetabular deficiency: the anterior part of the acetabular roof is too ...
Figure 7
(A) AP view showing only osteophytosis; (B) FP view: posteroinferior JSN (black arrow). Note also the subchondral sclerosis in the area of JSN, and the osteophytes arising from the posterior horn of the acetabulum and from the posteroinferior part of ...

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