Summary Thirty-six consecutive patients with breast cancer and liver metastases with abnormal liver biochemistry were treated with epirubicin 25 mg m-2 i.v. weekly. No dose modification was made for abnormal liver biochemistry, but dose intensity was adjusted by delaying treatment according to myelosuppression. The UICC overall response rate according to UICC criteria was 11/36 (30%) and median response duration was 27 weeks. Liver biochemistry improved in a further seven patients. Treatment was well tolerated. Epirubicin given in this way is effective in patients with breast cancer and liver metastases. An initial deterioration in liver biochemistry may occur before there is a response to epirubicin.Liver metastases are common in patients with advanced breast cancer. The prognosis is worse for these patients than after recurrence in either soft tissue (Fentiman et al., 1986) or bone (Coleman & Rubens, 1987 Group, 1986). The administration of chemotherapy may be complicated by the liver's role in both cytotoxic drug activation, as for cyclophosphamide (Bagley et al., 1973), and metabolism, as with doxorubicin (Benjamin et al., 1974). Moreover, although anthracyclines are the most active single agents in patients with breast cancer (Steiner et al., 1983), toxicity can be severe in patients with impaired liver function and reduced hepatic drug clearance (Benjamin et al., 1974).Epirubicin (4'-epidoxorubicin) is a new anthracycline, structurally related to doxorubicin and with similar activity in patients with advanced breast cancer (Brambilla et al., 1986). It is eliminated more rapidly than doxorubicin (Camaggi et al., 1988) and, at equimolar doses, is less toxic than doxorubicin (Brambilla et al., 1986). We report our experience of the efficacy and toxicity of epirubicin in patients with breast cancer and liver metastases who have abnormal liver biochemistry.Patients received a low dose of epirubicin on a weekly schedule, with the aim of giving a high dose intensity whilst minimising toxicity.
Patients and methodsThirty-six patients with histologically proven breast cancer, progressive liver metastases and abnormal liver biochemistry were entered into this phase II study.