NCIt definition : A low grade childhood congenital malignant neoplasm arising from the kidney. It is
characterized by the presence of fibroblastic cells. The majority of cases occur in
the first year of life. Complete excision is usually associated with an excellent
prognosis.;
Alternative definition : CDISC: A congenital malignant neoplasm of the kidney characterized by the presence
of fibroblastic cells.; NCI-GLOSS: A type of kidney tumor that is usually found before birth by ultrasound
or within the first 3 months of life. It contains fibroblastic cells (connective tissue
cells), and may spread to the other kidney or to nearby tissue. Congenital mesoblastic
nephroma is more common in males.; NICHD: A low grade childhood congenital malignant neoplasm arising from the kidney,
which is characterized by the presence of fibroblastic cells.;