Trial of Nab-paclitaxel in Patients With Desmoid Tumors and Multiply Relapsed/Refractory Desmoplastic Small Round Cell Tumors and Ewing Sarcoma

Subjects in the DT cohort will receive a maximum of three cycles. Subjects in the DSRCT and ES cohort will receive unlimited cycles until disease progression, the subject begins a new anticancer treatment, withdrawal of parent/guardian/subject consent/assent, parent/guardian/subject refusal, physician decision, toxicity that cannot be managed by dose delay or dose reduction alone or the study ends for any reason