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Embryonal precursors of Wilms tumor.


ABSTRACT: Adult cancers often arise from premalignant clonal expansions. Whether the same is true of childhood tumors has been unclear. To investigate whether Wilms tumor (nephroblastoma; a childhood kidney cancer) develops from a premalignant background, we examined the phylogenetic relationship between tumors and corresponding normal tissues. In 14 of 23 cases studied (61%), we found premalignant clonal expansions in morphologically normal kidney tissues that preceded tumor development. These clonal expansions were defined by somatic mutations shared between tumor and normal tissues but absent from blood cells. We also found hypermethylation of the H19 locus, a known driver of Wilms tumor development, in 58% of the expansions. Phylogenetic analyses of bilateral tumors indicated that clonal expansions can evolve before the divergence of left and right kidney primordia. These findings reveal embryonal precursors from which unilateral and multifocal cancers develop.

SUBMITTER: Coorens THH 

PROVIDER: S-EPMC6914378 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Embryonal precursors of Wilms tumor.

Coorens Tim H H THH   Treger Taryn D TD   Al-Saadi Reem R   Moore Luiza L   Tran Maxine G B MGB   Mitchell Thomas J TJ   Tugnait Suzanne S   Thevanesan Christine C   Young Matthew D MD   Oliver Thomas R W TRW   Oostveen Minou M   Collord Grace G   Tarpey Patrick S PS   Cagan Alex A   Hooks Yvette Y   Brougham Mark M   Reynolds Ben C BC   Barone Giuseppe G   Anderson John J   Jorgensen Mette M   Burke G A Amos GAA   Visser Johannes J   Nicholson James C JC   Smeulders Naima N   Mushtaq Imran I   Stewart Grant D GD   Campbell Peter J PJ   Wedge David C DC   Martincorena Iñigo I   Rampling Dyanne D   Hook Liz L   Warren Anne Y AY   Coleman Nicholas N   Chowdhury Tanzina T   Sebire Neil N   Drost Jarno J   Saeb-Parsy Kourosh K   Stratton Michael R MR   Straathof Karin K   Pritchard-Jones Kathy K   Behjati Sam S  

Science (New York, N.Y.) 20191201 6470


Adult cancers often arise from premalignant clonal expansions. Whether the same is true of childhood tumors has been unclear. To investigate whether Wilms tumor (nephroblastoma; a childhood kidney cancer) develops from a premalignant background, we examined the phylogenetic relationship between tumors and corresponding normal tissues. In 14 of 23 cases studied (61%), we found premalignant clonal expansions in morphologically normal kidney tissues that preceded tumor development. These clonal exp  ...[more]

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