Acute Intermittent Porphyria: A Diagnostic Conundrum

This case report presents the case of a 20-year-old female patient who sought emergency medical attention for severe abdominal pain, nausea and vomiting, tachycardia, hypertension, and discolored urine. Initial diagnostic evaluations yielded no significant abnormalities; however, subsequent analysis revealed elevated urinary porphobilinogen, corroborating a diagnosis of acute intermittent porphyria (AIP). The patient's medical history included recurrent urinary tract infections and a prior episode of syndrome of inappropriate antidiuretic hormone secretion (SIADH), in conjunction with psychiatric comorbidities of anxiety and depression. Management encompassed a multifaceted approach involving supportive therapies, such as hydration and analgesia, alongside the imperative to abstain from using contraindicated pharmacological agents. Following referral to the National Acute Porphyria Service (NAPS), the patient received intravenous Haem arginate, resulting in clinical improvement and subsequent discharge. Nonetheless, she later necessitated further hospitalization due to the recurrence of similar symptoms. This case highlights the exigency of recognizing AIP in young women presenting with nonspecific symptoms, necessitating a high index of clinical suspicion. Furthermore, it accentuates the critical importance of early specialist intervention to avert severe sequelae associated with acute episodes. The integration of targeted educational initiatives within Acute Medicine departments is paramount for fostering awareness and facilitating prompt diagnosis and management of this rare yet significant disorder.

Intrahepatic Cholangiocarcinoma and Acute Intermittent Porphyria: A Case Report

Patients suffering from different forms of acute hepatic porphyria present a high risk of primary liver cancer, specifically hepatocellular carcinoma and cholangiocarcinoma, determined by the activity of the disease even though an exact mechanism of carcinogenesis has not been recognized yet. Here, we present the clinical case of a 72-year-old woman who, approximately 29 years after the diagnosis of acute intermittent porphyria, presented with intrahepatic cholangiocarcinoma with a histological diagnosis of adenocarcinoma starting from the biliary-pancreatic ducts, which was diagnosed during the clinical and anatomopathological evaluation of a pathological fracture of the femur.

[Anesthesia in patients with acute porphyria]

Porphyrias are a group of rare, mostly inherited metabolic disorders of heme biosynthesis. Each type of porphyria results from a specific deficiency of one of the pathway enzymes, causing a characteristic accumulation and excretion of heme precursors. Diagnosis is confirmed by the biochemical detection of these porphyrins and the precursors in urine, feces and blood. Porphyrias can be classified into acute and non-acute forms. The clinical presentation is unspecific and includes acute neurovisceral and/or cutaneous symptoms. The latent phase can evolve into a potentially life-threatening acute crisis, which is often misdiagnosed. The four acute hepatic porphyrias are relevant for anesthesiologists as precipitating factors are commonly found in the perioperative setting. Safe anesthetic management in cases of known porphyria is possible by adherence to current recommendations. The immediate administration of heme arginate as specific treatment for acute attacks is decisive for the outcome.

Acute intermittent porphyria: general aspects with focus on pain

Despite medical advances, the diagnosis and management of acute intermittent porphyria continues to be challenging. Acute pain is one of the most important clinical manifestations in acute intermittent porphyria, but management and pain assessment have been poorly studied in these patients. The lack of information and evidence based recommendations regarding these topics in the medical literature is certainly surprising. Furthermore, pain management is discussed based on extrapolating concepts adopted for other pain syndromes. An important arsenal of medications, including reportedly safe opioid and non-opioid analgesics, is available for use in this type of patient. In addition to conducting an extensive review of the current literature, the present article aims to show the general aspects of a disease that generates a challenge for the clinician, emphasizing what is related to pain as a cardinal symptom and to create awareness about the need for studies supporting the development of guidelines, based on evidence obtained from analgesic management in patients presenting with this disorder. A systematic assessment directed at understanding the physiopathological processes underlying acute pain combined with a stepwise approach to pain management with safe opioid and non-opioid drugs constitutes the fundamental basis for a successful pain management program in patients with acute intermittent porphyria.

Elective cholecystectomy performed on patient with variegate porphyria-Propofol-based total intravenous anesthesia with target-controlled infusion

Porphyria is caused by disorders of enzymes that synthetize porphyrins. Both elective and emergency surgical procedures on patient suffering from porphyria may provoke acute symptoms. These patients require special anesthetic management since some of commonly used anesthetic agents may also induce acute manifestation of porphyria. We present the case of 53-year-old woman previously diagnosed with porphyria who underwent elective laparoscopic cholecystectomy. Propofol-based total intravenous anesthesia with target-controlled infusion was used. Such conduct proved to be safe regarding clinical symptoms, although biochemical markers were slightly elevated after procedure. Propofol seems to be the safest hypnotic drug to use in porphyria; however, special care should be taken is such cases.