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.Discuss the pathophysiology and diagnosis of a case of pheochromocytoma. Give an account of preparation monitoring and anesthetic management of a 25 years old patient suffering from pheochromocytoma. For MD anaesthesia exam

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pheochromocytoma anesthetic management perioperative

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This is a complete MD Anaesthesia examination-level answer. Here is a brief orientation of the key sections:
What this answer covers (exam blueprint):
  1. Pathophysiology - Catecholamine synthesis pathway, cardiovascular and metabolic effects, mechanism of intraoperative hemodynamic instability (hypertension during manipulation vs. hypotension after ligation)
  2. Diagnosis - Biochemical workup (plasma fractionated metanephrines as gold standard, 24-hr urine, clonidine suppression test) followed by imaging (CT, MRI, MIBG scan)
  3. Preoperative Preparation - The mandatory sequence: alpha-blockade FIRST (phenoxybenzamine), then beta-blockade, then volume expansion; the 2014 Endocrine Society BP/HR targets; the Roizen criteria; metyrosine for refractory cases
  4. Monitoring - Arterial line before induction is non-negotiable; central line, 5-lead ECG, urinary catheter, and optional TEE
  5. Anesthetic Management - Drugs to use (propofol, fentanyl, vecuronium, isoflurane) vs. drugs to avoid (ketamine, halothane, succinylcholine, morphine, pancuronium, ephedrine); intraoperative hypertension treatment (phentolamine, nicardipine, SNP); post-ligation hypotension (fluids + phenylephrine); postoperative hypoglycemia
High-yield exam points for a 25-year-old patient: Young age mandates genetic testing; higher likelihood of a familial syndrome (MEN2, VHL, SDH mutation); all the same anesthetic principles apply with heightened vigilance for bilateral disease and lifelong surveillance.
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