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January 7, 1899, Vol XXXII, No. 1 >
ARTICLE | January 7, 1899

THE SO-CALLED EMBRYONAL GLANDULAR TUMORS OF THE KIDNEY.

JAMA. 1899;XXXII(1):33-34. doi:10.1001/jama.1899.02450280041004.
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Our knowledge of tumors is constantly increasing. The occurrence of certain tumors in childhood and infancy has of late attracted especial notice. Many of these tumors of early life are frequently referred to as congenital, but as Lubarsch emphasizes, the frequency with which tumors in childhood are observed does not constitute any proof of their congenital origin. However, when such tumors develop before or very soon after birth, and when certain heterologous formations of tissue depending upon misplacements are found in them, they can certainly be looked upon as substantiating Cohnheim's theory of the development of tumors from an embryonal matrix.

It has long been noted that the genito-urinary organs are especially liable to be the seat of tumors in early life. The kidney is the part of the genito-urinary tract most frequently involved, and the tumors observed are more often malignant than benign. Heinecke1 collected 138 malignant tumors

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