Final answer:
Abandonment constitutes when a doctor suddenly stops treating or communicating with a patient without a valid reason or adequate notice, potentially affecting the patient's health and well-being.
Step-by-step explanation:
When a doctor suddenly stops treating or communicating with a patient, this can constitute abandonment. Abandonment occurs when a healthcare professional ends the doctor-patient relationship without a valid reason or adequate notice, potentially jeopardizing the patient's health and well-being.
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