Related Experiment Video
Updated: Aug 10, 2026

Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats
Published on: August 1, 2018
"Stress" polycythaemia and peripheral facial palsy complications of severe hypertension
Insights
Severe hypertension in an infant caused recurrent polycythemia and peripheral facial palsy. Controlling blood pressure resolved these neurological and hematological issues, highlighting the need for hypertension screening in facial palsy cases.
Area of Science:
- Pediatric Neurology
- Clinical Hematology
- Cardiovascular Medicine
Background:
- Peripheral facial palsy is a common neurological deficit in children.
- Hypertension is a significant risk factor for various vascular and neurological complications.
- Polycythemia, an elevated red blood cell count, can have diverse etiologies.
Observation:
- An 11-month-old boy presented with recurrent episodes of generalized convulsions and peripheral facial palsy.
- Both episodes were associated with polycythemia and severe, unexplained hypertension.
- Neurological deficits, including facial palsy, resolved with hypertension management.
Findings:
- The polycythemia was attributed to contracted plasma volume secondary to severe hypertension.
- Peripheral facial palsy was likely caused by a facial canal thrombus, evidenced by preserved hearing and lacrimation.
- Effective control of hypertension led to the resolution of facial palsy and normalization of hematocrit.
Implications:
- This case underscores a potential link between severe hypertension and recurrent peripheral facial palsy in pediatric patients.
- Routine blood pressure monitoring is crucial in the diagnostic workup of children presenting with peripheral facial palsy.
- Early identification and management of hypertension can prevent serious neurological and hematological complications.
Abstract:
An 11-month-old boy had an episode of generalized convulsions followed by a right peripheral facial palsy, which resolved gradually within 3 weeks. Three months later he had another similar episode of convulsions followed by a left peripheral facial palsy. On both occasions it was found that he had polycythaemia. A careful physical examination discovered that the child had severe hypertension. Extensive laboratory investigations did not reveal a cause for his hypertension. Haematologic investigations showed that the polycythaemia was due to a contracted plasma volume as a result of the hypertension. The peripheral facial palsy most probably was due to a blood clot in the facial canal, below the origin of the nerve to m. stapedius, as audiograms were normal and lacrimation preserved. Control of the hypertension resulted in resolution of the facial palsy within 4 weeks and normal haematocrit readings within 6 weeks. It should be stressed that every patient with peripheral facial palsy should be examined for hypertension.
More Related Videos
Related Concept Videos
Alterations in Blood Pressure
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart beats)...
Hypertension III: Clinical Manifestations and Diagnostic Studies
Peripheral Artery Disease I: Introduction
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
Hemodialysis II: Procedure and Complications
Portal Hypertension

