an unusual presentation of pheochromocytoma
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Crit Care & Shock (2011) 14:46-51 An unusual presentation of pheochromocytoma Zulmari Campos-Santiago, Juan C. Bird-Caceres, Jose M. Ortiz-Betancourt, Carmen Pimentel-Torres, Karla Torres-Torres, Maria E. Ocasio-Tascn, William

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  1. Crit Care & Shock (2011) 14:46-51 An unusual presentation of pheochromocytoma Zulmari Campos-Santiago, Juan C. Bird-Caceres, Jose M. Ortiz-Betancourt, Carmen Pimentel-Torres, Karla Torres-Torres, Maria E. Ocasio-Tascón, William Rodríguez-Cintrón Abstract Pheochromocytoma is a rare catecholamine-secreting the ICU an abdominal computed tomography (CT) scan tumor that may arise from chromaffin cells of the was done where a 7.7 cm heterogeneous mass at the right adrenal medulla, or extra-adrenal paraganglion tissue. adrenal gland was described, renal cell carcinoma was Their prevalence in the general population is estimated suspected. Patient was then transferred to our center. at about 1 per 100,000 adults. Characteristically, patient Upon arrival anti-hypertensive medication, nicardipine, presents with sustained or paroxysmal hypertension and was started. A new abdominal CT revealed a large right the classic triad of symptoms which include episodic adrenal gland hemorrhage. Pheochromocytoma was headache, sweating and tachycardia. There are numerous considered among the working diagnosis. He was started reports in the literature of unusual presentations of on phenoxybenzamine and beta-blocker therapy. Urine/ benign or metastatic pheochromocytomas including but plasma metanephrines, catecholamines, creatinine and not limited to multisystemic failure, hypertensive crisis, vanillylmandelic acid (VMA), were done. A magnetic arrhythmias, catecholamine-induced myocarditis and resonance imaging (MRI) confirmed that the mass was of cardiomyopathy, myocardial ischemia and infarction, suprarenal origin. The diagnosis of pheochromocytoma pulmonary, cardiovascular, gastrointestinal, nephrologic was finally done. His hospital course was also remarkable and neurologic emergencies. This is the case of a 43- for acute renal failure (ARF), supraventricular year-old male patient with previous medical history of tachycardia, elevated liver transaminases and pancreatic hypertension. He went to a nearby clinic for evaluation enzymes, and mechanical intestinal obstruction. After of 6 day abdominal distention associated with nausea acute clinical conditions resolved, patient tolerated diet and vomits and pressure sensation on the epigastric area. and was discharged to continue outpatient therapy with Patient was admitted to an intensive care unit (ICU) phenoxybenzamine and metoprolol, to undergo surgery with diagnosis of hypertensive crisis and upon arrival to in the mainland United State of America (USA). Key words : Pheochromocytoma, multiorgan failure, hypertension, catecholamines, adrenal gland mass, methanephrines. From Pulmonary and Critical Care Fellowship Training Program VA Caribbean Healthcare System, San Juan, Puerto Rico (Zulmari Campos-Santiago), Internal Medicine VA Caribbean Healthcare System, San Juan, Puerto Rico (Juan C. Bird-Caceres, Jose M. Ortiz-Betancourt, Carmen Pimentel-Torres, and Karla Torres- Torres), attending physician at the Pulmonary/Critical Care Medicine Fellowship Training Program VA Caribbean Healthcare System, San Juan, Puerto Rico (Maria E. Ocasio-Tascón), and Program Director, Pulmonary/Critical Care Medicine Fellowship Training Program VA Caribbean Healthcare System, San Juan, Puerto Rico (William Rodríguez-Cintrón) Address for correspondence: William Rodríguez-Cintrón, MD Pulmonary/Critical Care Medicine Section San Juan Veterans Affair Medical Center 10 Casia St, San Juan PR 00921-3201 Tel: 787-641-7582 x 31644 Fax: 787-641-9541 Email: zulmari.campos-santiago@va.gov 46 Crit Care & Shock 2011. Vol 14, No.2

  2. (1) or extra adrenal paraganglionic tissue. It presents as Case Report paroxysmal or sustained hypertension episodes in young A 43-year-old male patient with previous medical history of to middle-age patients, probably occurring in less than hypertension went to a nearby clinic for evaluation of 6 day 0.2% (2-3) of patients with hypertension. Its prevalence in abdominal distention associated with nausea and vomits and the general population is estimated at about 1 per 100,000 a pressure sensation on the epigastric area. He was admitted adults. Pheochromocytomas produce, store, and secrete to ICU with diagnosis of hypertensive crisis and upon catecholamines. The clinical features are due predominantly arrival to the ICU an abdominal CT scan was done where to the release of catecholamines. (4-6) Pheochromocytomas a 7.7cm heterogeneous mass at the right adrenal gland was are highly vascular. Characteristically, patient presents with described, renal cell carcinoma was suspected. Patient was sustained or paroxysmal hypertension and the classic triad tumor that may arise from chromaffin cells of the then transferred to our medical ICU where anti-hypertensive of symptoms which include episodic headache, sweating and medication, nicardipine, was started. At initial evaluation in tachycardia. (6-7) Most patients come to medical attention our ICU his physical exam was remarkable for an acutely as a result of a hypertensive crisis, (6) paroxysmal symptoms ill appearance patient with dry oral mucosa, diminished suggestive of seizure disorder or anxiety attacks, or bowel sounds and associated tenderness to deep palpation hypertension that responds poorly to conventional treatment. at epigastric and left upper quadrant abdominal area. A new Less commonly, unexplained hypotension or shock in abdominal CT scan revealed a large right adrenal gland association with surgery or trauma will suggest the diagnosis. hemorrhage ( Figure 1 ), in addition to previous findings, (4) There are numerous reports in the literature of unusual pheochromocytoma was considered the working diagnosis. presentations of benign or metastatic pheochromocytomas He was started on phenoxybenzamine and beta-blocker including but not limited to multisystem failure, hypertensive resonance imaging (MRI) confirmed that the mass was of therapy. Urine and plasma metanephrines, catecholamines, crisis, arrhythmias, catecholamine-induced myocarditis creatinine and VMA were obtained, and found subsequently and cardiomyopathy, myocardial ischemia and infarction, was finally done. His hospital course was also remarkable elevated ( Tables 1 and 2 ). An abdominal MRI ( Figures 2 and pulmonary, cardiovascular, gastrointestinal, nephrologic 3 ) confirmed that the mass was of suprarenal origin. Hence and neurologic emergencies. (4-6,8) In rare cases, as in the diagnosis of pheochromocytoma was established. our patient, multiorgan system failure can be the main manifestation of a pheochromocytoma. (6) Patients may His hospital course was also remarkable for ARF of pre-renal exhibit complications such as: cardiovascular (myocardial origin, which resolved with isotonic fluids. In addition, he infarction, arrhythmias, hypertensive crisis, congestive had episodes of supraventricular tachycardia, elevated liver heart failure, etc), pulmonary (pulmonary edema, acute transaminases and pancreatic enzymes, and mechanical respiratory distress syndrome), gastrointestinal (pancreatitis, intestinal obstruction. After acute clinical conditions cholecystitis, megacolon, ileus, peritonitis, perforation, resolved, patient tolerated diet and was discharged with bleeding, etc), renal (acute renal failure, hematuria, renal ambulatory therapy with phenoxybenzamine and metoprolol, artery stenosis, etc), neurologic (seizures, hemiplegia, to undergo surgery in the mainland USA. Approximately muscle weakness), metabolic (diabetes ketoacidosis, one month after been discharged from our institution the lactic acidosis). Gastrointestinal complaints as initial patient underwent surgery where a pheochromocytoma manifestation may be considered related to high levels of with internal bleeding was removed from the right adrenal circulating catecholamines resulting in decrease intestinal gland. Histopathology was reported as benign with no local peristalsis, motility, and tone, intermittent constipation ileus invasion. After discharge home patient has remained free of or a megacolon. (4,6) Hemorrhage of the tumor can lead to all hypertensive medications. excretion of vast amounts of catecholamines and worsened clinical picture; in which emergency surgery would be required and delay in diagnosis can be fatal. (8) In non emergent cases, surgery for these subjects should be planned Discussion with experienced surgeons and patient should be clinically Pheochromocytoma is a rare catecholamine-secreting tumor stable, as a catecholamine storm could be developed at the that may arise from chromaffin cells of the adrenal medulla, time of the surgery. Crit Care & Shock 2011. Vol 14, No.2 47

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