Final answer:
Assessment findings indicating a potential substance use problem in Izaak would include behavioral signs, injury reporting inconsistencies, and physical markers suggesting use. The independent case of Wei suggests a separate health issue related to his immune system, needing further evaluation.
Step-by-step explanation:
The subject of this question pertains to recognizing potential substance use problems. Since the scenario provided does not include specific details about Izaak's assessment findings, we cannot definitively conclude he has a substance use disorder.
However, a healthcare professional would look for certain signs or symptoms, such as erratic or evasive behavior, inconsistencies in reporting injury details, prior treatment for similar injuries without a clear history of trauma, or physical signs like track marks or signs of withdrawal.
The case study provided about Wei, who is experiencing unusual fatigue, weight loss, and the presence of a lump on the side of his neck, suggests that Wei may be suffering from a health issue that may or may not be related to substance use, and requires further medical assessment.
This may indicate possible issues with Wei's immune system, and a doctor would likely order further testing to diagnose the underlying cause of these symptoms.