Tags

Type your tag names separated by a space and hit enter

[High resolution computerized tomography of middle ear abnormalities].
Laryngorhinootologie. 1996 Apr; 75(4):187-94.L

Abstract

BACKGROUND

The aim of this study was to analyze malformed petrous bones with computed tomography and to develop a radiologic score which can help to judge the indication for operative reconstructions.

METHODS

One hundred forty-two petrous bones in 71 patients with unilateral or bilateral microtia, atresia of the external auditory canal, and malformations of the middle ear were evaluated with high-resolution CT.

RESULTS

In 97% of patients with severe auricular dysplasia, there was dysplasia of the middle ear ossicles; in 70% the stapes was malformed. In 32% the oval window was occluded, and in 7% the round window. In 75%, the canal of the facial nerve was displaced, and 16% also showed abnormalities of the labyrinth. A close correlation between the malformation of the auricle and of the middle ear was not found.

CONCLUSIONS

High-resolution CT is necessary for the evaluation of malformed middle ears. Based on the abnormalities described, we propose a radiologic score for the assessment of malformed petrous bones. This consists of the following criteria: external auditory meatus, pneumatization of the mastoid and of the tympanic space, size of the tympanic space, facial nerve, vessels, malleus and incus, stapes, oval and round window. The graded points of each structure are added up to the score, which might range between 0 and 28. This score can help to judge the indication for reconstruction of the middle ear. In bilateral malformation we suggest a middle ear reconstruction of the better hearing ear if the score is greater than or equal to 15, and in unilateral malformation if it is at least 20. In patients with lower scores, we only suggest hearing aids.

Authors+Show Affiliations

Klinik für Hals-, Nasen- und Ohrenheilkunde, Medizinischen Universität zu Lübeck.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

ger

PubMed ID

8688123

Citation

Siegert, R, et al. "[High Resolution Computerized Tomography of Middle Ear Abnormalities]." Laryngo- Rhino- Otologie, vol. 75, no. 4, 1996, pp. 187-94.
Siegert R, Weerda H, Mayer T, et al. [High resolution computerized tomography of middle ear abnormalities]. Laryngorhinootologie. 1996;75(4):187-94.
Siegert, R., Weerda, H., Mayer, T., & Brückmann, H. (1996). [High resolution computerized tomography of middle ear abnormalities]. Laryngo- Rhino- Otologie, 75(4), 187-94.
Siegert R, et al. [High Resolution Computerized Tomography of Middle Ear Abnormalities]. Laryngorhinootologie. 1996;75(4):187-94. PubMed PMID: 8688123.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [High resolution computerized tomography of middle ear abnormalities]. AU - Siegert,R, AU - Weerda,H, AU - Mayer,T, AU - Brückmann,H, PY - 1996/4/1/pubmed PY - 1996/4/1/medline PY - 1996/4/1/entrez SP - 187 EP - 94 JF - Laryngo- rhino- otologie JO - Laryngorhinootologie VL - 75 IS - 4 N2 - BACKGROUND: The aim of this study was to analyze malformed petrous bones with computed tomography and to develop a radiologic score which can help to judge the indication for operative reconstructions. METHODS: One hundred forty-two petrous bones in 71 patients with unilateral or bilateral microtia, atresia of the external auditory canal, and malformations of the middle ear were evaluated with high-resolution CT. RESULTS: In 97% of patients with severe auricular dysplasia, there was dysplasia of the middle ear ossicles; in 70% the stapes was malformed. In 32% the oval window was occluded, and in 7% the round window. In 75%, the canal of the facial nerve was displaced, and 16% also showed abnormalities of the labyrinth. A close correlation between the malformation of the auricle and of the middle ear was not found. CONCLUSIONS: High-resolution CT is necessary for the evaluation of malformed middle ears. Based on the abnormalities described, we propose a radiologic score for the assessment of malformed petrous bones. This consists of the following criteria: external auditory meatus, pneumatization of the mastoid and of the tympanic space, size of the tympanic space, facial nerve, vessels, malleus and incus, stapes, oval and round window. The graded points of each structure are added up to the score, which might range between 0 and 28. This score can help to judge the indication for reconstruction of the middle ear. In bilateral malformation we suggest a middle ear reconstruction of the better hearing ear if the score is greater than or equal to 15, and in unilateral malformation if it is at least 20. In patients with lower scores, we only suggest hearing aids. SN - 0935-8943 UR - https://www.unboundmedicine.com/medline/citation/8688123/[High_resolution_computerized_tomography_of_middle_ear_abnormalities]_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2007-997561 DB - PRIME DP - Unbound Medicine ER -