Introduction: Accurate preoperative localization is essential for the surgical management of primary hyperparathyroidism (PHPT). Although ultrasound, technetium-99m sestamibi scintigraphy, and 4D-CT provide high localization rates, a subset of patients have non-localizing or discordant imaging. Selective parathyroid venous sampling (PVS) is an invasive adjunct that measures regional parathyroid hormone (PTH) gradients to aid localization in challenging cases. We present a threepatient case series demonstrating the utility of PVS in diagnostically complex PHPT. Cases: We retrospectively reviewed three female patients (ages 44–63) with biochemically confirmed PHPT who underwent selective PVS following negative or discordant imaging. Venous sampling was performed via femoral access with catheterization of bilateral internal jugular, brachiocephalic, and bilateral thyroidal veins. PTH levels were measured at each site and compared to peripheral levels to identify regional gradients. Surgical findings, intraoperative parathyroid hormone monitoring (IOPTH), histopathology, and postoperative biochemical outcomes were recorded. All patients had non-localizing or discordant preoperative imaging (USG, sestamibi, 4D-CT). PVS identified significant PTH gradients, guiding focused parathyroidectomy. IOPTH monitoring confirmed successful excision in all operated patients. Histopathology confirmed parathyroid adenoma in two cases; in the third case, the parathyroid tissue was identified within the thyroid gland. Postoperative PTH levels suppressed (range 0.79–1.48 pg/mL) in keeping with successful parathyroidectomy. Conclusion PVS effectively lateralized disease in imaging-negative PHPT and directly guided surgical management. When conventional imaging fails, PVS combined with intraoperative PTH monitoring enables targeted surgery and favorable biochemical outcomes.
Humans

Introduction: Hemorrhagic suprarenal masses presenting with hypertensive emergency pose a significant diagnostic challenge, particularly when biochemical and radiological findings are inconclusive. The clinical presentation may mimic catecholamine-secreting tumors, necessitating consideration of a broad differential diagnosis, including pheochromocytoma, adrenocortical carcinoma, retroperitoneal hemorrhage, and hematological-related extramedullary lesions. Accurate diagnosis is essential, as management strategies differ significantly. Case: We report a 48-year-old male smoker with no known prior medical illness who presented with sudden left-sided chest pain radiating to the epigastrium, associated with vomiting. On arrival, he was markedly hypertensive (207/131 mmHg). He reported a 1-year history of paroxysmal palpitations, headaches, migraines, and intermittent diaphoresis. Computed tomography angiography excluded aortic dissection but demonstrated a left retroperitoneal hemorrhage with non-visualization of the adrenal gland, suggestive of adrenal or tumor-related hemorrhage. He was initially managed empirically as a pheochromocytoma while undergoing biochemical evaluation; however, urinary metanephrines were only mildly elevated. Repeat imaging demonstrated interval enlargement of a non-enhancing suprarenal mass, raising concern for tumor-related hemorrhage. Subsequent ultrasonography, however, favored a liquefied hematoma, and percutaneous drainage yielded 750 mL of sanguineous fluid, resulting in marked clinical improvement. Notably, an elevated hematocrit prompted further evaluation for erythrocytosis. Subsequent testing confirmed JAK2 mutation-positive polycythemia rubra vera, providing a unifying explanation for both the erythrocytosis and spontaneous adrenal hemorrhage. The patient was commenced on hydroxyurea and referred for hematology follow-up. Conclusion Adrenal hemorrhage may closely mimic pheochromocytoma in hypertensive emergencies. A systematic, multidisciplinary approach integrating clinical, biochemical, and imaging findings is essential to avoid misdiagnosis and guide appropriate management, particularly in patients with underlying hematological disorders.
Hypertensive Crisis ; Pheochromocytoma ; Polycythemia Vera ; Hematoma

Introduction: Primary adrenal lymphoma (PAL) is a rare extranodal lymphoma, accounting for less than 1% of cases. It often presents with non-specific constitutional symptoms and features of adrenal insufficiency. The absence of pathognomonic findings frequently leads to delayed diagnosis, by which time the disease is often advanced, contributing to poor prognosis. Case: A 59-year-old male with type 2 diabetes mellitus and previously treated pulmonary tuberculosis presented with 1 month of lethargy, anorexia, weight loss, and abdominal pain. He was cachectic but hemodynamically stable (BP 120/81 mmHg; glucose 5.1 mmol/L), with otherwise unremarkable systemic examination. Laboratory evaluation revealed hyponatremia (120 mmol/L), hyperkalemia (6.0 mmol/L), and severe hypercalcemia (4.4 mmol/L). A short Synacthen test confirmed adrenal insufficiency. Computed tomography demonstrated marked bilateral adrenal enlargement with bulky masses (8.9 × 8.7 × 8.7 cm right; 9.9 × 7.6 × 10.2 cm left), suggestive of malignant infiltration. Adrenal protocol imaging revealed indeterminate lesions with attenuation >40 Hounsfield Unit and relative washout <40%. Ultrasound-guided biopsy of the right adrenal gland was performed. The patient was discharged on hydrocortisone replacement with plans for early follow-up. One week later, he presented again in adrenal crisis with severe hypoglycemia (1.1 mmol/L) and cardiovascular collapse. Despite resuscitative efforts, he succumbed. Histopathology subsequently confirmed diffuse large B-cell lymphoma, activated B-cell subtype, consistent with PAL. Conclusion This case highlights the diagnostic pitfalls of PAL, particularly when constitutional symptoms mimic chronic infections such as tuberculosis. It underscores the need for high clinical suspicion in patients with bilateral adrenal masses and adrenal insufficiency. Early recognition, adequate steroid replacement including mineralocorticoid therapy, and prompt tissue diagnosis are critical to prevent rapid deterioration and improve outcomes.
Lymphoma