In this article, we discuss the findings of a study about how patients who have been diagnosed with cancer learn about their disease. This is a form of learning that is not often thought of as learning, within the practices in which it takes place. It involves learners who neither possess specific forms of knowledge, nor are sure about what knowledge there is to possess. In medical practice, this form of learning is often referred to in terms such as "information seeking," and the implemented practices of providing information do not always seem to take account of current understandings of teaching and learning amongst educational and psychological researchers. Here we report the findings of a U.K. Department of Health project concerned with the acceptability and usefulness of the Internet as a cancer information source. Post-Vygotskian theory is deployed in the interpretation of the data and the development of a model of the learning. (Contains 1 table.)