Pseudogout - a rare manifestation of hungry bone syndrome after focused parathyroidectomy

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Pseudogout, also known as calcium pyrophosphate deposition disease, is a rheumatological condition arising from accumulation of calcium pyrophosphate dihydrate crystals in connective tissues. We present a case of a 56-year-old Bangladeshi woman who underwent focused right inferior parathyroidectomy for primary hyperparathyroidism from a right inferior parathyroid adenoma. On the first post-operative day, she complained of left elbow painful swelling with redness and warmth. Arthrocentesis of left elbow was done due to suspicion of septic arthritis. Two weeks prior to this surgery, she had sudden bilateral knee swelling was diagnosed in her home country of bilateral knee osteoarthritis with effusion and arthrocentesis showed no crystals. Aspiration of left elbow showed calcium pyrophosphate crystals, associated with post parathyroidectomy hypocalcemia, hypomagnesemia confirming pseudogout. Her uric acid level was normal. Bilateral wrist x-rays showed triangular fibrocartilage complex chondrocalcinosis. The patient's condition improved with colchicine and naproxen, as well as calcium and magnesium replacement. Her left elbow swelling and pain resolved. Pseudogout flare is a rare but known sequelae after parathyroidectomy. Early recognition and expeditious treatment is essential.

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