Tool-mediated patienthood: structural plurality in oncology, surgery, and palliative care.

Patient-centered care (PCC) is widely endorsed in contemporary medicine, yet philosophical analyses often approach it through concept-first approaches that define patienthood in advance-typically in terms of autonomy, holistic personhood, or rational agency-and then assess clinical practice by reference to these ideals. This paper argues that such an approach can obscure how patienthood is configured in practice. We develop a tool-first approach that treats cognitive, communicative, and material tools as analytically primary for understanding how patients are individuated in clinical reasoning. The argument is grounded in an ethnographic case study conducted in a specialized cancer hospital, focusing on outpatient clinics in medical oncology, colorectal surgery, and palliative care. Rather than treating ethnography as descriptive background, we use it to identify tools-in-use that structure what becomes salient, actionable, and patient-relevant in situated encounters. Across these settings, distinct configurations of tools generate systematically different modes of patienthood. In oncology, staging systems and expectation management configure patients as therapeutic trajectories oriented toward uncertain futures. In surgery, anatomical diagrams and probabilistic framings individuate patients as operative bodies embedded in structured decision spaces. In palliative care, symptom scales, narrative practices, and informational scaffolding configure patients as experiential subjects and epistemic agents. We analyze these differences as instances of structural plurality: patterned, tool-mediated modes of patient individuation that are internally coherent yet irreducible to a single model. On this account, ethical ideals commonly associated with PCC-such as autonomy, shared decision-making, and informed consent-can be understood less as prior normative standards applied to practice, and more as contingent achievements that depend on how tools structure salience, understanding, and possibilities for agency in clinical contexts.