Abnormalities of the Lesser Tuberosity on Radiography and MRI: Association with Subscapularis Tendon Lesions
Ueli Studler1,
Christian W. A. Pfirrmann1,
Bernhard Jost2,
Valentin Rousson3,
Juerg Hodler1 and
Marco Zanetti1
1 Department of Radiology, University Hospital Balgrist, Forchstrasse 340,
CH-8008 Zurich, Switzerland.
2 Department of Orthopedic Surgery, University Hospital Balgrist, Zurich,
Switzerland.
3 Biostatistics Unit, University of Zurich, Zurich, Switzerland.
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Fig. 1A —58-year-old woman with grade 1 subscapularis tendon tear at
arthroscopy of right shoulder. Minor cortical irregularities (arrows)
and grade 2 cyst (arrowhead) were seen on this axial radiograph.
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Fig. 1B —58-year-old woman with grade 1 subscapularis tendon tear at
arthroscopy of right shoulder. Sagittal oblique T1-weighted MR arthrography
image (TR/TE, 647/15) shows minor cortical irregularities (arrow) and
large cyst (arrowhead).
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Fig. 1C —58-year-old woman with grade 1 subscapularis tendon tear at
arthroscopy of right shoulder. Image in transverse plane obtained using
water-excitation true fast imaging with steady-state free precession (9/3)
shows numerous cysts in lesser tuberosity (arrowheads).
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Fig. 2B —57-year-old man with complete detachment (grade 3 tear) of
right subscapularis tendon at arthroscopy. Sagittal oblique T1-weighted MR
arthrography image (TR/TE, 450/12) reveals minor cortical irregularities
(arrows).
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Fig. 2C —57-year-old man with complete detachment (grade 3 tear) of
right subscapularis tendon at arthroscopy. Arthroscopic view from posterior
portal reveals complete detachment (arrowheads) of subscapularis
tendon (black arrow) from lesser tuberosity (LT). Scar-tissue
adhesions between subscapularis tendon and pulley system (white
arrow) prevent tendon from being proximally retracted. Star indicates
glenohumeral joint capsule.
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Fig. 3B —77-year-old woman with major subscapularis tendon tear (grade
2) at arthroscopy of right shoulder. Marked cortical irregularities
(arrows) of lesser tuberosity were also seen on sagittal oblique
T1-weighted image (TR/TE, 439/15).
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Fig. 3C —77-year-old woman with major subscapularis tendon tear (grade
2) at arthroscopy of right shoulder. Small cyst (arrowhead) is
present on this image (9/3) in transverse plane obtained using
water-excitation true fast imaging with steady-state free precession
sequence.
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Fig. 4A —Prevalence of osseous abnormalities of lesser tuberosity for
each surgical grade of subscapularis tendon tears. Percentage of patients
presenting with cortical irregularities (A) and cysts (B) of
lesser tuberosity revealed by radiographs are shown as bar charts for each
surgical grade of subscapularis tendon tears and each reader.
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Fig. 4B —Prevalence of osseous abnormalities of lesser tuberosity for
each surgical grade of subscapularis tendon tears. Percentage of patients
presenting with cortical irregularities (A) and cysts (B) of
lesser tuberosity revealed by radiographs are shown as bar charts for each
surgical grade of subscapularis tendon tears and each reader.
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Copyright © 2008 by the American Roentgen Ray Society.
