Síndrome de dehiscencia de canales semicirculares. Descripción de dos casos

  1. Pablo Santos Gorjón
  2. Eva María Mingo Sánchez
  3. Elena Sánchez Terradillos
  4. Juan Luis Sánchez Jara Sánchez
  5. Gonzalo Martín Hernández
Journal:
Revista ORL

ISSN: 2444-7986,  2444-7986

Year of publication: 2015

Volume: 6

Pages: 132-138

Type: Article

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Abstract

Dehiscent semicircular canal syndrome leads to dizziness and nystagmus induced by pressure. In the tomography scan a week wall of affected semicircular canal is observed. In the most symptomatic patients a chirurgical approach is needed. Is important to consider these syndrome because we can threat these kind of dizziness. The object of these revision is do a bibliographic review. The second objective is remark that a multislice CT is necessary to diagnose the syndrome. Material and methods: We present two clinical issues of young patients with dehiscent semicircular canal and recurrent vestibulopaty and flowery symptoms. One of them present a superior canal dehiscent and the other one was on posterior canal. Results: A multislice CT was done in both cases when we suspect the fistula, and both images confirm the problem. No one of them required a chirurgical approach (laberintectomy or blockage of fistula). Discussion: Dehiscent canal in CT not always course with Tullio phenomenon. The syndrome is more frequent nowadays because of new CT techniques. We should ask for our radiologist especially if we suspect a fistula in anamnesis. Incidental radiologic fistula don’t lead always to diagnose the syndrome, because if membranous part of canal is unaltered there is not clinical alteration. Diagnosis is important to explain the symptoms and take the best decision to treat our patients. In jugular prominent bulb and sensorineural hearing loss we had to confirm that there is not a fistula in posterior semicircular canal. An inferior threshold of VEMP is detected respect to general population. Conclusion: No all of patients showing dizziness must have a nuclear resonance at fist time. VEMP can confirm the clinical suspect.

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