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Metanephric adenoma (MA) is a rare, benign tumour of the kidney, that can have a microscopic appearance similar to a nephroblastoma (Wilms tumours), [1] or a papillary renal cell carcinoma. It should not be confused with the pathologically unrelated, yet similar sounding, mesonephric adenoma .
Histopathologic types of kidney tumor, with relative incidences and prognoses. Cystic nephroma is seen at bottom right in pie chart. cystic partially differentiated nephroblastoma; cystic standard nephroblastoma (cystic Wilm's tumor) cystic mesoblastic nephroma; cystic renal cell carcinoma; other renal cysts
Nephrogenic adenoma is a benign growth typically found in the urinary bladder. It is thought to result from displacement and implantation of renal tubular cells, as this entity in kidney transplant recipients has been shown to be kidney donor derived. [1] This entity should not be confused with the similar-sounding metanephric adenoma.
Wilms' tumor is a malignant tumor containing metanephric blastema, stromal and epithelial derivatives. Characteristic is the presence of abortive tubules and glomeruli surrounded by a spindled cell stroma. The stroma may include striated muscle, cartilage, bone, fat tissue, and fibrous tissue. Dysfunction is caused when the tumor compresses the ...
Metanephric dysplastic hematoma of the sacral region (MDHSR) has been described by Cozzutto and Lazzaroni-Fossati in 1980, [1] by Posalaki et al. in 1981 [2] and by Cozzutto et al. in 1982. [3] Three additional cases were seen by Finegold.
The TNM Classification of Malignant Tumors (TNM) is a globally recognised standard for classifying the anatomical extent of the spread of malignant tumours (cancer). It has gained wide international acceptance for many solid tumor cancers, but is not applicable to leukaemia or tumors of the central nervous system .
Tumor markers may be used for the following purposes: Monitoring the malignancy; When a malignant tumor is found by the presence of a tumor marker, the level of marker found in the body can be monitored to determine the state of the tumor and how it responds to treatment. If the quantity stays the same during treatment it can indicate that the ...
Clear cell sarcoma of the kidney, which is responsible for 5-10% of childhood pediatric tumors, occurs predominantly in children from 2 to 3 years of age. Unlike mesoblastic nephroma, clear cell sarcoma of the kidney presents with metastasis, particularly to bone, in 5-6% of cases; it histology is diverse and has been mistaken for mesoblastic ...