| Namespace | MPheno.ontology | Obsolete | false |
| description | any structural anomaly of the solid cord of epithelial cells that emerges from the mammary bud and grows down from the primary mammary mesenchyme and into a second stromal compartment, the fat pad precursor, beneath the dermis; in female mouse embryos, the primary mammary cord (mammary sprout) is formed between E15.5 and E16.5; once the primary cord reaches the adipocytes of the fat pad (around E16), it begins to branch in a characteristic dichotomous fashion to form the initial ductal tree |
