Would you offer adjuvant systemic therapy for recurrent fallopian tube leiomyosarcoma after resection of an isolated liver metastasis that presented within 1 year from primary surgery?  

If this was an R0 resection, then I would not offer adjuvant therapy. It would be beneficial to understand if this is a high-grade or a low-grade leiomyosarcoma and also the ER/PR status. If strongly positive, then perhaps maintenance aromatase inhibitor can be considered, however, there is no good ...