AJR 2005; 184:1211-1215
© American Roentgen Ray Society
Cystic Lesions in the Posterosuperior Portion of the Humeral Head on MR Arthrography: Correlations with Gross and Histologic Findings in Cadavers
Wook Jin1,
Kyung Nam Ryu2,
Yong Koo Park3,
Weon Kyu Lee4,
Sung Hye Ko2 and
Dal Mo Yang1
1 Department of Diagnostic Radiology, Gil Medical Center, Gachon Medical School,
Inchoen 405-760, South Korea.
2 Department of Diagnostic Radiology, Kyung Hee University Medical Center, Kyung
Hee University, Hoekidong 1, Dongdaemoon-ku, Seoul 130-702, South Korea.
3 Department of Anatomic Pathology, Kyung Hee University Medical Center, Kyung
Hee University, Seoul 130-702, South Korea.
4 Department of Anatomy, Gachon Medical School, Inchoen 405-760, South
Korea.
OBJECTIVE. The purpose of this study was to describe the appearance
of cysts in the posterosuperior portion of the humeral head on MR arthrography
and to correlate the MRI findings with the gross and histologic findings in
cadavers.
CONCLUSION. Cysts in the posterosuperior portion of the humeral head
(the bare area) were located in the lateral humeral head just posterior to the
greater tuberosity. These cysts were lined with collagen connective tissue and
were connected to the joint spaces. We suggest that these pseudocysts in the
posterosuperior portion of the humeral head may be a normal variant rather
than being an abnormal change or vascular channel.

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Copyright © 2005 by the American Roentgen Ray Society.