Photo Quiz

Hip Pain Without Injury



FREE PREVIEW Log in or buy this issue to read the full article. AAFP members and paid subscribers get free access to all articles. Subscribe now.


FREE PREVIEW Subscribe or buy this issue. AAFP members and paid subscribers get free access to all articles.

Am Fam Physician. 2010 Jul 1;82(1):31.

A 23-year-old man presented with right hip pain that had worsened over four weeks. He was a member of his college's soccer team, but had no history of falls or recent trauma. He had similar hip pain two years earlier that was self-limited, but the rest of his medical history was unremarkable. He had no bowel or bladder symptoms. Although over-the-counter pain medication was initially effective, he was eventually unable to play soccer.

On physical examination, the patient walked with an antalgic gait. He was afebrile and had normal vital signs. His musculoskeletal examination revealed normal spinal curvature, nontender pelvic region, and equal leg length. He had tenderness with extreme flexion and rotation of the right hip, which reduced his range of flexion. Range of motion in the other joints was normal. Pelvic radiography was performed (Figures 1 and 2).

Figure 1.

View Large


Figure 1.


Figure 1.

Figure 2.

View Large


Figure 2.


Figure 2.

Question

Based on the patient's history, physical examination, and radiography findings, which one of the following is the most likely diagnosis?

A. Avulsion fracture of anterior inferior iliac spine.

B. Calcific tendinitis of the rectus femoris.

C. Myositis ossificans of the rectus femoris.

D. Synovial sarcoma.

Discussion

The answer is B: calcific tendinitis of the rectus femoris. The rectus femoris is the only one of the quadriceps muscles to cross the hip joint, which allows it to act as a hip flexor and a knee extensor. The rectus femoris has two heads: the anterior head, which originates from the anterior inferior iliac spine, and the reflected or posterior head, which originates from a groove above the acetabular ring. The rectus femoris attaches to the base of the patella.

The patient's radiographs show opacifications (calcific deposits) in a clustered pattern at the anterior inferior iliac spine, just above the right acetabular rim. The comet-tail appearances of these opacifications suggest that the calcific deposits lie within the tendons. Computed tomography (CT) or magnetic resonance imaging (MRI) can confirm the diagnosis.

Groin injuries account for 2 to 5 percent of all sports injuries and 5 to 7 percent of injuries in soccer players.1 Diagnosis starts with a patient history detailing repetitive strain and pain with hip flexing activities. Physical examination reveals tenderness with full flexion of the hip and adduction, thus stretching, of the rectus femoris muscle.

Treatment of rectus femoris tendinitis includes rest, antiinflammatory medications, and physical therapy until the pain resolves. Therapeutic ultrasound, and CT-guided analgesic and steroid injections have all been used with similar results.2 Patients with avulsion fracture of the anterior inferior iliac spine present with acute pain in the anterior lateral aspect of the groin with limited hip flexion after injury. Radiography shows a clear disruption in the bony cortex. The condition is treated with rest, and the patient may return to exercise as pain permits.3

Myositis ossificans of the quadriceps muscle is common in contact sports. The muscle is crushed against the bone, and improper treatment leads to bone formation within the muscle. Radiography shows bone formation approximately two to four weeks after the injury. Myositis ossificans is usually treated with rest, but may require excision.4

Synovial sarcoma is a soft tissue tumor. Examination usually reveals a palpable, mildly tender mass with or without a history of trauma. Plain radiography findings are often normal, but MRI shows an ill-defined lesion at the musculotendinous junction of the rectus femoris muscle. Biopsy and excision are needed for diagnosis and management.5

Summary Table

Condition Characteristics

Avulsion fracture of anterior inferior iliac spine

Acute pain in the anterior lateral aspect of the groin, limited hip flexion, radiography shows clear disruption in the bony cortex

Calcific tendinitis of rectus femoris

Repetitive strain injury, radiography shows calcium deposits at the musculotendinous junction

Myositis ossificans of the rectus femoris

Bone formation within the rectus muscle following crush injury to the quadriceps muscle, radiography shows opacifications within the muscle mass

Synovial sarcoma

Soft tissue tumor, magnetic resonance imaging shows ill-defined lesion, normal plain radiography findings

Summary Table

View Table

Summary Table

Condition Characteristics

Avulsion fracture of anterior inferior iliac spine

Acute pain in the anterior lateral aspect of the groin, limited hip flexion, radiography shows clear disruption in the bony cortex

Calcific tendinitis of rectus femoris

Repetitive strain injury, radiography shows calcium deposits at the musculotendinous junction

Myositis ossificans of the rectus femoris

Bone formation within the rectus muscle following crush injury to the quadriceps muscle, radiography shows opacifications within the muscle mass

Synovial sarcoma

Soft tissue tumor, magnetic resonance imaging shows ill-defined lesion, normal plain radiography findings

Address correspondence to Babafemi Adenuga, MD, at badenuga@howard.edu. Reprints are not available from the authors.

Author disclosure: Nothing to disclose.

REFERENCES

1. Morelli V, Smith V. Groin injuries in athletes Am Fam Physician. 2001;64(8):1405–1414.

2. Sarkar JS, Haddad FS, Crean SV, Brooks P. Acute calcific tendinitis of the rectus femoris. J Bone Joint Surg Br. 1996;78(5):814–816.

3. Lynch SA, Renström PA. Groin injuries in sport: treatment strategies. Sports Med. 1999;28(2):137–144.

4. Sodl JF, Bassora R, Huffman GR, Keenan MA. Traumatic myositis ossificans as a result of college fraternity hazing. Clin Orthop Relat Res. 2008;466(1):225–230.

5. Temple HT, Kuklo TR, Sweet DE, Gibbons CL, Murphey MD. Rectus femoris muscle tear appearing as a pseudo-tumor. Am J Sports Med. 1998;26(4):544–548.

Contributing editor for Photo Quiz is John E. Delzell, Jr., MD, MSPH.

A collection of Photo Quizzes published in AFP is available at http://www.aafp.org/afp/photoquiz.

The editors of AFP welcome submissions for Photo Quiz. Guidelines for preparing and submitting a Photo Quiz manuscript can be found in the Authors' Guide at http://www.aafp.org/afp/photoquizinfo. To be considered for publication, submissions must meet these guidelines. E-mail submissions to afpphoto@aafp.org.



Copyright © 2010 by the American Academy of Family Physicians.
This content is owned by the AAFP. A person viewing it online may make one printout of the material and may use that printout only for his or her personal, non-commercial reference. This material may not otherwise be downloaded, copied, printed, stored, transmitted or reproduced in any medium, whether now known or later invented, except as authorized in writing by the AAFP. Contact afpserv@aafp.org for copyright questions and/or permission requests.

Want to use this article elsewhere? Get Permissions


Article Tools

  • Download PDF
  • Print page
  • Share this page
  • AFP CME Quiz

Information From Industry

More in Pubmed

Navigate this Article