Cystic lesions in the posterosuperior portion of the humeral head on MR arthrography: correlations with gross and histologic findings in cadavers.
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.


CONCLUSIONS
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.
Jin
Wook
W
Department of Diagnostic Radiology, Gil Medical Center, Gachon Medical School, Inchoen 405-760, South Korea.
Ryu
Kyung Nam
KN
Park
Yong Koo
YK
Lee
Weon Kyu
WK
Ko
Sung Hye
SH
Yang
Dal Mo
DM
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001845:Bone Cysts / Q000473:pathology*; D002102:Cadaver; D006801:Humans; D006811:Humerus / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010784:Photomicrography; D012785:Shoulder Joint / Q000473:pathology*