In general, medical information should not be withheld from a patient. Patients have the right to be fully informed about their health and medical treatment, and withholding information from them can undermine their ability to make informed decisions about their care.
There may be certain situations, however, in which it may be appropriate to withhold some medical information from a patient. For example, if a patient is not mentally capable of understanding the information, or if revealing certain information could cause serious harm to the patient's mental or emotional health, it may be necessary to withhold that information. Additionally, if a patient is being treated for a contagious or infectious disease, it may be necessary to withhold information about their diagnosis or treatment in order to protect the health and safety of others.
Overall, medical information should only be withheld from a patient in exceptional circumstances and with the guidance of a healthcare provider. The decision to withhold information should be made carefully, with the patient's best interests in mind, and should be based on the specific circumstances of each case.