Abdom Imaging. 2010 Dec;35(6):726-31. doi: 10.1007/s00261-010-9643-3.
Deep rectosigmoid endometriosis: "mushroom cap" sign on T2-weighted MR imaging
Yoon JH11, Choi D, Jang KT, Kim CK, Kim H, Lee SJ, Chun HK, Lee WY, Yun SH.

Clin Radiol. 2000 Jan;55(1):19-24.
Infantile fibromatosis in childhood: Findings on MR imaging and pathologic correlation
Ahn JM11, Yoon HK, Suh YL, Kim EY, Han BK, Yoon JH, Kim SH, Cho JM, Kim SM, Kang HS.

AJNR Am J Neuroradiol. 1999 Apr;20(4):571-4.
Calcification in chronic maxillary sinusitis: Comparison of CT findings with histopathologic results
Yoon JH11, Na DG, Byun HS, Koh YH, Chung SK, Dong HJ.