Diagnostic dilemmas in acute intermittent porphyria. A case report.
OBJECTIVE
To present the importance of early diagnosis of acute intermittent porphyria (AIP) in patients with atypical presentation and discuss the diagnostic problems encountered in this case.


METHODS
A 15-year-old girl presented with upper respiratory tract infection, fever, seizures and abdominal pain. An initial diagnosis of encephalitis was made. She received antiviral drugs and anticonvulsants. Two weeks later, she developed progressive flaccid quadriplegia and facial weakness. She also developed respiratory paralysis and was intubated. Cytoalbuminous dissociation was seen in the cerebrospinal fluid. A diagnosis of severe Guillain-Barré syndrome was made.


METHODS
The patient received a course of intravenous immunoglobulins which did not result in any clinical improvement. Plasmapheresis, started after 12 weeks, led to partial improvement. The patient continued to have attacks of seizures, abdominal pain and vomiting with severe quadriparesis. A repeat screening test for urine porphyrins was positive, and AIP was confirmed by specific porphobilinogen deaminase in the blood. The patient was treated with large doses of intravenous glucose, followed by injections of hematin. The patient improved remarkably. She was extubated, discharged from Intensive Care Unit and started on a rehabilitation program.


CONCLUSIONS
This patient was initially diagnosed erroneously with a negative screening test for AIP and consequently treated inappropriately. The proper diagnosis was made after repeating the screening test followed by specific tests of porphobilinogen deaminase.
Periasamy
Vembu
V
Department of Neurology, Ibn Sina Hospital, PO Box 25427, 13115 Safat, Kuwait. thomas_tom@go.com
al Shubaili
Asmahan
A
Girsh
Y
Y
D000293:Adolescent; D003937:Diagnosis, Differential; D004660:Encephalitis / Q000175:diagnosis; D005260:Female; D020275:Guillain-Barre Syndrome / Q000175:diagnosis*; D006801:Humans; D020335:Paraparesis / Q000209:etiology / Q000628:therapy; D017118:Porphyria, Acute Intermittent / Q000150:complications / Q000175:diagnosis* / Q000628:therapy