The primary objective of the trial is to assess whether there is no difference in disease-free survival for patients treated with a 1cm excision margin when compared to a 2cm margin for stage II primary melanomas (AJCC 8th edition; pT2b-pT4b).

This phase II MATCH trial studies how well treatment that is directed by genetic testing works in patients with solid tumors or lymphomas that have progressed following at least one line of standard treatment or for which no agreed upon treatment approach exists. Genetic tests look at the unique genetic material (genes) of patients' tumor cells. Patients with genetic abnormalities (such as mutations, amplifications, or translocations) may benefit more from treatment which targets their tumor's particular genetic abnormality. Identifying these genetic abnormalities first may help doctors plan better treatment for patients with solid tumors, lymphomas, or multiple myeloma.

This research is being done to see if an investigational blood test can predict whether cancer will recur (come back) after initial treatment

This study will evaluate the efficacy, safety, and pharmacokinetics of adjuvant atezolizumabwhen given in combination with trastuzumab emtansine compared with placebo andtrastuzumab emtansine for patients with residual invasive HER2-positive breast cancerfollowing neoadjuvant taxane-based and HER2-targeted therapy including trastuzumab, whoare at high risk of disease recurrence. The primary endpoint for this study is invasivedisease-free survival (IDFS).