# Interobserver consistency and diagnostic challenges in HER2-ultralow breast cancer: a multicenter study

> Research article (ESMO Open, 2025) · cited 19× · AI/ML

**Wikidata**: [openalex:W4407011370](https://www.wikidata.org/wiki/openalex:W4407011370)  
**Source**: https://4ort.xyz/entity/interobserver-consistency-and-diagnostic-challenges-in-her2-ultralow-breast-cancer-a-multicenter-study