A patient is complaining of nausea, fever, and severe back pain. The patient was previously diagnosed with hyperparathyroidism. This patient MOST likely suffers from?

This patient is most likely suffering from kidney stones due to their diagnosis of hyperparathyroidism and the symptoms presented. Hyperparathyroidism results in elevated levels of parathyroid hormone, which can lead to increased calcium levels in the blood (hypercalcemia). High calcium levels can cause calcium to crystallize and form stones in the kidneys, leading to symptoms such as severe back pain (often felt in the flank area), nausea, and fever if an infection develops.

The connection between hyperparathyroidism and kidney stones is significant due to the metabolic processes involved, where the excess calcium is excreted through the kidneys, increasing the likelihood of stone formation. The specific symptoms of nausea and back pain align with a kidney stone episode, solidifying the likelihood of this diagnosis.