Is there any data available regarding the benefit of adjuvant chemotherapy in patients with early stage, lymph node negative, triple negative adenosquamous breast cancers?  

Except for a rare low-grade adenosquamous carcinoma, which, according to UpToDate (Taqhian A, Merajver S. Overview of the treatment of newly diagnosed, non-metastatic breast cancer - Rare histologies — Certain very rare subtypes of metaplastic carcinoma (eg, low-grade adenosquamous a...