|Dataset||MPO Gene-Phenotype Associations|
|Category||disease or phenotype associations|
|Description||overdevelopment or increased size of the inner portion of the adrenal gland that consists mainly of chromaffin cells, usually due to an increase in the number of cells (Mammalian Phenotype Ontology, MP_0008301)|
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2 gene mutations causing the adrenal medulla hyperplasia phenotype in transgenic mice from the MPO Gene-Phenotype Associations dataset.