Hydroxymethylbilane Synthase Gene Mutation: The Hidden Driver of Abdominal Pain and Neurological Symptoms in Acute Intermittent Porphyria
Bibliographic record
Abstract
Abstract: Mutations in the hydroxymethylbilane synthase (HMBS) gene can lead to a deficiency of the HMBS enzyme, allowing porphyrins to accumulate to toxic levels in the liver and other organs, leading to acute intermittent porphyria (AIP). This case report describes the medical journey of a 20-year-old female, previously in good health, who experienced multiple hospitalizations and clinic visits due to severe abdominal pain episodes and remained undiagnosed for over 6 years. Despite the nonspecific nature of these symptoms, a suspicion of acute porphyria confirmed by genetic analysis revealed a splice pathogenic variant (c.826-2A>T) in the HMBS gene in a heterozygous state. As the disease progressed, the patient developed a series of complications, including hyponatremia, autonomic instability, and motor neuropathy, culminating in complete paralysis (quadriplegia) and respiratory failure. The case highlights the importance of early recognition and differential diagnoses in managing AIP, with genetic testing playing a crucial role in confirming the diagnosis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".