Which clinical feature is most associated with neurologic porphyrias such as acute intermittent porphyria?

Which clinical feature is most associated with neurologic porphyrias such as acute intermittent porphyria?

• A. Photosensitivity
• B. Neurovisceral attacks
• C. Jaundice
• D. Hemolysis

Answer: (B)

Neurologic porphyrias present with acute neurovisceral crises rather than skin symptoms. The defining pattern is sudden, severe abdominal pain with vomiting and autonomic instability, often accompanied by neuropsychiatric changes and sometimes progressive weakness or neuropathy. These attacks are classically triggered by certain drugs, fasting, hormones, or infections, and reflect the buildup of neurotoxic porphyrin precursors affecting the nervous system and autonomic function. Photosensitivity points to cutaneous porphyrias, where skin symptoms dominate due to porphyrin deposition in the skin. Jaundice or hemolysis can occur with hepatic involvement in some cases but do not define the neurologic porphyrias. Thus, the neurovisceral attack pattern is the feature most closely associated with neurologic porphyrias.

Neurologic porphyrias present with acute neurovisceral crises rather than skin symptoms. The defining pattern is sudden, severe abdominal pain with vomiting and autonomic instability, often accompanied by neuropsychiatric changes and sometimes progressive weakness or neuropathy. These attacks are classically triggered by certain drugs, fasting, hormones, or infections, and reflect the buildup of neurotoxic porphyrin precursors affecting the nervous system and autonomic function.

Photosensitivity points to cutaneous porphyrias, where skin symptoms dominate due to porphyrin deposition in the skin. Jaundice or hemolysis can occur with hepatic involvement in some cases but do not define the neurologic porphyrias. Thus, the neurovisceral attack pattern is the feature most closely associated with neurologic porphyrias.