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HOME > J Pathol Transl Med > Volume 23(3); 1989 > Article
Original Article Renomedullary Interstitial Cell Tumor.
Eon Sub Park, Mi Kyung Kim, Jae Hyung Yoo, Kye Yong Song
Journal of Pathology and Translational Medicine 1989;23(3):371-373
DOI: https://doi.org/
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Department of Pathology, College of Medicine, Chung-Ang University, Seoul, Korea.

We present an ultrastructure of an incidentally found renomedullary interstitial tumor also called as medullary fibroma in a 77 year-old female who had a metastatic adenocarcinoma of colon to the ureter. This tumor was a small and grayish white nodule in renal medulla, measuring 0.4 x 0.4 cm. Microscopically the tumor composed of spindle cells, with some vacuolation and intercellular collagen fibers. The electron microscopic observation of the spindle cells reveal that nuclei are spindle to oval shape and cytoplasm contain abundant rough endoplasmic reticulum, polyribosome without microfilaments and cisterna like structures supporting that the renomedullary interstitial cell tumor is renal interstitial cell origin than fibroblasts.

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JPTM : Journal of Pathology and Translational Medicine