Bilharziasis urinary disorders are characterized by recurent hematuria, overactive bladder symptoms (urgency, frequency and urge incontinence) and sometimes weak stream with or without urinary retention. We report 10 cases of urodynamic assessment. RESULTS The main urodynamic symptom was overactive detrusor with uninhibited detrusor contraction during the filling phase. Only 1 patient had underactive detrusor leading to urinary retention. Urinary symptoms were secondary to a neurogenic abnormality (spinal lesion) in 2 cases, and to a specific lesion of bladder mucosa in 8 cases. CONCLUSIONS Urodynamic investigations are usefull in bilharziasis urinary disorders in order to specify the pathophysiology of urinary symptoms and to point a specific neurogenic (spinal) alteration in the genesis of the urinary symptoms.