What is Mesoblastic?
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.
How can you tell the difference between Wilms tumor and neuroblastoma?
Indianapolis, IN 46223. therapy. neuroblastoma may invade the kidney; whereas, a Wilms tumor may display exo- phytic growth, calcification, or large lymph node metastases or may cross the midline. be difficult to distinguish close contact between the primary tumor and adjacent structures (liver, diaphragm, etc. )
What causes congenital mesoblastic nephroma?
Congenital mesoblastic nephroma is a rare renal tumor that is diagnosed during pregnancy and is associated with polyhydramnios, prematurity, and neonatal hypertension. Differential diagnoses include Wilms tumor, adrenal neuroblastoma, and other abdominal tumors.
What is unilateral Wilms tumor?
Most Wilms tumors are unilateral, which means they affect only one kidney. Most often there is only one tumor, but a small number of children with Wilms tumors have more than one tumor in the same kidney. About 5% to 10% of children with Wilms tumors have bilateral disease (tumors in both kidneys).
What is bilateral Wilms tumor?
Wilms’ tumor is a type of kidney cancer that occurs in young children. It is responsible for 95% of all malignant kidney tumors in patients under the age of 15 years old. Wilms’ tumor can occur in one kidney (unilateral) or in both kidneys (bilateral) and can spread throughout the rest of the body.
What is a mesoblastic nephroma?
The mesoblastic nephroma is a benign renal tumor that usually appears as a neonatal abdominal mass. The tumor is composed of connective tissue that grows between nephrons and usually replaces most of the renal parenchyma. Radiographic and sonographic images reflect this cellular composition and uniq …
What is CMN nephroma?
Mesoblastic nephroma, also sometimes known as a congenital mesoblastic nephroma (CMN), Boland’s tumor or fetal renal hamartoma , is, in general, a benign renal tumor that typically occurs in utero or in infancy. It is the commonest neonatal renal tumor.
How is Wilms tumor distinguished from nephroblastomatosis?
Wilms tumor is distinguished by vascular invasion and displacement of structures and is bilateral in approximately 10% of cases. Nephroblastomatosis occurs most often in neonates and is characterized by multiple bilateral subcapsular masses, often associated with Wilms tumors.
How are pediatric renal masses differentiated from Wilms tumor?
A variety of pediatric renal masses may be differentiated from Wilms tumor on the basis of their clinical and imaging features. Wilms tumor is distinguished by vascular invasion and displacement of structures and is bilateral in approximately 10% of cases.