Final answer:
The priority differential diagnosis for Mabel Johnson in the iHuman case likely includes diabetes mellitus (option A) , characterized by symptoms such as high blood glucose levels, excessive thirst, and urination, which must be confirmed or ruled out by appropriate lab tests.
Step-by-step explanation:
The priority differential diagnosis for Mabel Johnson in the iHuman case should take into account symptoms presented and the most urgent conditions that need to be ruled out or confirmed. Considering the information provided, diabetes mellitus seems to be a critical one to consider. Diabetes is characterized by hyperglycemia, which refers to elevated blood glucose levels. This can lead to symptoms such as excessive thirst and urination. A detail that adds to the plausibility of this diagnosis is a test Robert underwent to determine if he was diabetic, suggesting relevance in the case context. It is important to note that both type 1 and type 2 diabetes involve issues with insulin, either in its production or the body's response to it.
When diagnosing diabetes mellitus, lab tests revealing higher than normal blood glucose levels are a primary indicator. Proper treatment of diabetes will usually involve lifestyle changes and may also include medication or insulin. This disease can present as juvenile or hereditary, particularly when it has an onset in childhood, and may involve a gene defect.