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The Korean Journal of Pathology 1997;31(4): 375-378.
Congenital Mesoblastic Nephroma.
Seok Hoon Jeon, Seung Sam Paik, Nam Hoon Kim, Moon Hyang Park, Jung Dal Lee
Department of Pathology, Hanyang University College of Medicine, Seoul 133-792, Korea.
Mesoblastic nephroma is an important differential diagnosis of a renal mass occurring in the neonatal period or in early childhood. It is a rare monomorphous congenital renal neoplasm most commonly recognized during the first 3 months of life. With the widespread application of ultrasound imaging, many cases are recognized prior to birth. We report a case of mesoblastic nephroma detected by ultrasonograph at 36 weeks of intrauterine fetal life and removed after birth. It showed a well circumscribed, grayish white, solid mass measuring 4x3x2 cm. The tumor was predominantly a classic type with a focal cellular pattern. Immunohistochemical and electron microscopic studies were done.
Key Words: Congenital Mesoblastic Nephroma; Kidney
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