Differential Diagnosis And Medical Screening In Physical Therapy Practice Exam

Night pain or pain at rest signals a non-mechanical pattern and is a classic red flag for serious pathology, including metastatic cancer pain. When cancer spreads to bone or other tissues, the resulting pain often persists even when the limb is not being used, can be deep and constant, and frequently wakes the patient at night. This contrasts with typical musculoskeletal pain that is activity-related, tends to improve with rest, and may be intermittent. Understanding this pattern helps you differentiate benign, movement-related pain from potential malignancy. The other scenarios describe pain that is more characteristic of mechanical or overuse issues—knee pain with activity, soreness after exertion, or headaches that are not specifically tied to rest—so they are less suggestive of a metastatic cancer process in the context of a physical therapy screen.