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MR imaging features of obturator internus bursa of the hip.

Hwang JY, Lee SW, Kim JO - Korean J Radiol (2008 Jul-Aug)

Bottom Line: The authors report two cases with distension of the obturator internus bursa identified on MR images, and describe the location and characteristic features of obturator internus bursitis; the "boomerang"-shaped fluid distension between the obturator internus tendon and the posterior grooved surface of the ischium.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology and Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, Korea. mshjy@ewha.ac.kr

ABSTRACT
The authors report two cases with distension of the obturator internus bursa identified on MR images, and describe the location and characteristic features of obturator internus bursitis; the "boomerang"-shaped fluid distension between the obturator internus tendon and the posterior grooved surface of the ischium.

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Related in: MedlinePlus

33-year-old male with calcific tendinitis of obturator internus tendon and infected bursitis.A. Transverse fat-suppressed Gd-enhanced T1-weighted MR image showing boomerang-shaped obturator internus bursitis (arrows) between obturator internus muscle and posterior surface of ischium (I). Obturator internus tendon, inferior gemellus muscle, and soft tissue around sciatic nerve (arrowheads) show strong enhancement in this image.B. Sagittal fat-suppressed Gd-enhanced T1-weighted MR image demonstrating location of obturator internus bursa (arrows), which lies anterior to obturator internus or inferior gemellus tendon (arrowheads) and posterior to ischium (I).C. Transverse multidetector CT maximum intensity projection image showing high density in posterior aspect of right hip joint, which represented calcific tendinitis (arrows) along obturator internus tendon.
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Figure 3: 33-year-old male with calcific tendinitis of obturator internus tendon and infected bursitis.A. Transverse fat-suppressed Gd-enhanced T1-weighted MR image showing boomerang-shaped obturator internus bursitis (arrows) between obturator internus muscle and posterior surface of ischium (I). Obturator internus tendon, inferior gemellus muscle, and soft tissue around sciatic nerve (arrowheads) show strong enhancement in this image.B. Sagittal fat-suppressed Gd-enhanced T1-weighted MR image demonstrating location of obturator internus bursa (arrows), which lies anterior to obturator internus or inferior gemellus tendon (arrowheads) and posterior to ischium (I).C. Transverse multidetector CT maximum intensity projection image showing high density in posterior aspect of right hip joint, which represented calcific tendinitis (arrows) along obturator internus tendon.

Mentions: A 33-year-old man was presented with a right buttock pain of two days duration, and had been febrile for two days, though this had been well controlled by antipyretics. A physical examination revealed tenderness, swelling, and local heating on the posterior region of the right buttock and paresthesia on the posterolateral aspect of his right leg. Pyriformis and Patrick tests were positive, and laboratory findings showed elevated ESR (27 mm/hr) and CRP (12.6 mg/dl) with mild leukocytosis (10,600/UI). MRI was performed under the impression of septic arthritis of the hip, and revealed a boomerang-shaped fluid collection over the posterior surface of the ischium, and diffuse enhancement of the obturator internus tendon and inferior gemellus muscle (Figs. 3A, B). An accompanying multidetector CT (MDCT) scan showed calcification along the obturator internus tendon (Fig. 3C). His symptoms also completely resolved after 21 days of antibiotic treatment.


MR imaging features of obturator internus bursa of the hip.

Hwang JY, Lee SW, Kim JO - Korean J Radiol (2008 Jul-Aug)

33-year-old male with calcific tendinitis of obturator internus tendon and infected bursitis.A. Transverse fat-suppressed Gd-enhanced T1-weighted MR image showing boomerang-shaped obturator internus bursitis (arrows) between obturator internus muscle and posterior surface of ischium (I). Obturator internus tendon, inferior gemellus muscle, and soft tissue around sciatic nerve (arrowheads) show strong enhancement in this image.B. Sagittal fat-suppressed Gd-enhanced T1-weighted MR image demonstrating location of obturator internus bursa (arrows), which lies anterior to obturator internus or inferior gemellus tendon (arrowheads) and posterior to ischium (I).C. Transverse multidetector CT maximum intensity projection image showing high density in posterior aspect of right hip joint, which represented calcific tendinitis (arrows) along obturator internus tendon.
© Copyright Policy - open-access
Related In: Results  -  Collection

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Show All Figures
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Figure 3: 33-year-old male with calcific tendinitis of obturator internus tendon and infected bursitis.A. Transverse fat-suppressed Gd-enhanced T1-weighted MR image showing boomerang-shaped obturator internus bursitis (arrows) between obturator internus muscle and posterior surface of ischium (I). Obturator internus tendon, inferior gemellus muscle, and soft tissue around sciatic nerve (arrowheads) show strong enhancement in this image.B. Sagittal fat-suppressed Gd-enhanced T1-weighted MR image demonstrating location of obturator internus bursa (arrows), which lies anterior to obturator internus or inferior gemellus tendon (arrowheads) and posterior to ischium (I).C. Transverse multidetector CT maximum intensity projection image showing high density in posterior aspect of right hip joint, which represented calcific tendinitis (arrows) along obturator internus tendon.
Mentions: A 33-year-old man was presented with a right buttock pain of two days duration, and had been febrile for two days, though this had been well controlled by antipyretics. A physical examination revealed tenderness, swelling, and local heating on the posterior region of the right buttock and paresthesia on the posterolateral aspect of his right leg. Pyriformis and Patrick tests were positive, and laboratory findings showed elevated ESR (27 mm/hr) and CRP (12.6 mg/dl) with mild leukocytosis (10,600/UI). MRI was performed under the impression of septic arthritis of the hip, and revealed a boomerang-shaped fluid collection over the posterior surface of the ischium, and diffuse enhancement of the obturator internus tendon and inferior gemellus muscle (Figs. 3A, B). An accompanying multidetector CT (MDCT) scan showed calcification along the obturator internus tendon (Fig. 3C). His symptoms also completely resolved after 21 days of antibiotic treatment.

Bottom Line: The authors report two cases with distension of the obturator internus bursa identified on MR images, and describe the location and characteristic features of obturator internus bursitis; the "boomerang"-shaped fluid distension between the obturator internus tendon and the posterior grooved surface of the ischium.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology and Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, Korea. mshjy@ewha.ac.kr

ABSTRACT
The authors report two cases with distension of the obturator internus bursa identified on MR images, and describe the location and characteristic features of obturator internus bursitis; the "boomerang"-shaped fluid distension between the obturator internus tendon and the posterior grooved surface of the ischium.

Show MeSH
Related in: MedlinePlus