
T-DXd and Dato-DXd are now approved treatments in Japan for patients with breast cancer.
A 38-year-old man consults for a small subcutaneous nodule of approximately 2 cm in diameter. Surgical excision of the tumor nodule is performed.
What is your Diagnosis?

!["Patients [with cancer] and physicians would rather have a fixed-duration treatment, if possible," said Julie M. Vose, MD, MBA, at SOHO 2026.](https://cdn.sanity.io/images/0vv8moc6/cancernetwork/1cfb57db416943d8f8690afb0bc0d13aa3d90683-400x400.jpg?w=350&fit=crop&auto=format)



