Hydroxy-9-methyl-2-ellipticinium for osseous metastases from breast cancer: a 5-year experience.

A group of 135 patients with osseous metastases from breast cancer were treated with hydroxy-9-methyl-2-ellipticinium (100 mg/m2 weekly). Although it was impossible to grade the response precisely, because only indirect criteria are available for assessing the course of bone metastases (radiographs, quantified 99mTc pyrophosphate scintigrams, CEA), it was considered that an objective response was obtained in 44 cases. These responses lasted from 3 to 17 months. The main characteristic of the compound is its lack of marrow toxicity, a valuable property in osseous lesions, where frequent marrow involvement makes it difficult to use conventional drugs. The major and most unpleasant side effect was an inhibition of salivary secretion, which causes other complications such as tongue mycosis, anorexia, and asthenia. Immunologic disorders were less frequent, and four patients developed severe tubular renal insufficiency.