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Progress in Medical Sciences ISSN: 2577 - 2996
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Progress in Medical Sciences. 2024; 8(5):(136-147)


A New Perspective in Diagnosis of Neuroendocrine Tumors and Pseudo Pheochromocytomas, Understanding the Biology Behind a Mislabeled Medical Terminology

M Nezami MD*, Jason Samarasena MD, Reza Nazemi, Mark Kidd PhD and Steven Hager MD

Abstract

Recently the incidence of undiagnosed hypertension that does not fit into either category of essential hypertension or secondary hypertension is becoming largely increased. Most of these cases are attributed to anxiety or forms of panic attacks associated with high blood pressure. Some in fact are lethal yet clinicians have been challenged to know the real cause of the disease. The term pseudopheochromocytoma widely used for patients who have typical presentation of pheochromocytoma but yet no concrete evidence of disease manifested in their imaging or lab reports to suggest increased production of adrenaline or neurepinephrine, as seen in typical pheochromocytomas. These patients suffer from life threatening attacks of hypertension, yet the only medical revenue offered are anxiolytics, or tricyclic antidepressants. Here we review a case of suspected pheochromocytoma and we present a novel theory about the real player behind all cases of pseudopheochromocytomas. Since in contrast to all other tumors, performing a tissue biopsy is detrimental in the case of pheochromocytomas, and therefore no one logically considers a tissue biopsy for adrenal gland, liquid biopsy( NETest by WREN Laboratory) is a great substitute with high accuracy to replace the tissue biopsy. We conclude that performing liquid biopsy on all cases of pseudopheochromocytoma is essentially life saving and can lead the clinician to appropriate course of action, when the other labs and functional imaging are inconclusive or negative. This is the very perfect example of why the traditional thinking of required presence of metanephrines in urine or blood, and nuclear studies(Dotetate scan/ Octrascan/ MiBG scan, etc…) for diagnosis of pheochromocytoma and surgical interventions depending on such tests is outdated.