![]() Treatment may be conservative or surgical, according to the extension of the cholesteatoma and the request of the patients. Diagnosis is based on clinical examination, and computed tomography (CT) scan is used to assess the extension of the cholesteatoma and to guide surgery procedure. Patients may present with otorrhea, otalgia, feeling of ear fullness, hearing loss, or without any complaint. According to the literature, primary cholesteatoma is observed in adult patients. It can be classified as primary (or spontaneous) and secondary. According to the literature, its incidence varies from 1 to 7.1 cases per 1000 new otologic patients. Cholesteatoma of the external auditory canal (EAC) is a rare occurrence. ![]() Ĭholesteatoma is more frequent in the middle ear. Cholesteatoma of external auditory canal: a case report. This is an Open Access article distributed under the terms of the Creative Commons Attribution International 4.0 License (), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Ĭite this article: Abdou Sy et al. Keywords: Cholesteatoma, external auditory canal, otorrhea, canalplasty Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.Case report | Volume 1, Article 11, | 10.11604/pamj-cm.2019.6 Cholesteatoma of external auditory canal: a case report Abdou Sy, Eric Regonne, Marie Yolande Missie, Malick NdiayeĬorresponding author: Eric Regonne, Otorhinolaryngology Department, Children’s Hospital of Diamniadio, Dakar, Senegal For the developmental research the left-right asymmetry might be a field of research. For the physician this differentiation represents a clinical and radiological challenge. The differentiation between benign and malign lesions in the CPA and IAC is important, as it requires diverse treatment protocols. In view of the sparse literature on treatment of single intracanalicular metastases, the review is broadened to the current treatment recommendations of single brain metastases. We address the issue of a possible regulation of CPA lesion laterality by asymmetrically expressed genes. The discussion focuses on the incidence of extra-axial CPA and IAC lesions with their clinical presentations and their radiological findings. The patient was treated with intrathecal chemotherapy. MRI showed an increase of the residual tumor and meningeosis carcinomatosa, and cerebrospinal fluid (CSF) examination was positive for tumor cells. The patient's condition deteriorated gradually. The investigations for the primary tumor site were all negative. ![]() Histological examination revealed blennogenic cylindrical adenocarcinoma. Due to progressive headaches and dizziness, the patient underwent a left transtemporal craniotomy with subtotal tumor resection. The follow-up MRI showed an unchanged pattern of contrast enhancement. Magnetic resonance imaging (MRI) showed an extra-axial mass most likely representing a left-sided vestibular schwannoma with characteristic contrast enhancement in the IAC. He presented 8 months later with left-sided tinnitus, progressive hearing loss, and attacks of vertigo. Cranial computed tomography scan revealed bilateral nonspecific periventricular and subcortical vascular lesions. We provide a review of uncommon lesions in the IAC and describe to our knowledge the first instance of a primary adenocarcinoma.Ī 60-year-old man presented with nausea and vomiting. Intracanalicular metastases of adenocarcinoma are documented, but a primary adenocarcinoma remains unreported. Despite the relatively frequent occurrence of multiple primary tumors, namely, 10% of intracranial tumors, metastasis is a rare occurrence within the internal auditory canal (IAC) and cerebellopontine angle (CPA).
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