Purpose
This website provides general information about radiotherapy and radiosurgery. It does not replace a medical consultation, diagnosis or individual treatment advice.
Scientific responsibility
Dr. Gustavo Nader Marta — MÉDICO, CRM-SP 133966, Radiotherapy specialist registration (RQE) 104627.
Institutional relationships
Professional affiliations are stated for biographical context, without implying that the institutions sponsor or endorse this independent website.
Images and references
The portrait was supplied for this project. Other digital illustrations are educational and do not depict actual patients or examinations. Source materials are referenced without reproducing their complete copyrighted content.
Personal information
This website has no patient registration forms or visitor analytics. Its hosting provider may record technical connection data, including IP addresses, to operate and secure the service. This notice must be updated before new external tools are introduced.
External links and WhatsApp
Telephone and WhatsApp links open third-party services that have their own privacy terms. Avoid sending sensitive medical documents unless you are using an appropriately authorised clinical channel.
Editorial updates
Health guidance and laws can change. Content should be reviewed periodically by the responsible professional.