2017 99:135–40.Ībdel-Aziz M, Rashed M, Khalifa B, Talaat A, Nassar A. Pediatric langerhans cell histiocytosis of the lateral skull base. Majumder A, Wick CC, Collins R, Booth TN, Isaacson B, Kutz JW. Squamous cell carcinoma of the middle ear: report of three cases. Imaging of complications of acute mastoiditis in children. Vazquez E, Castellote A, Piqueras J, et al. The changing face of petrous apicitis-a 40-year experience. Gradenigo’s syndrome: a common infection with uncommon consequences. Bezold’s abscess in children: case report and review of the literature. Marioni G, de Filippis C, Tregnaghi A, Marchese-Ragona R, Staffieri A. Bezold’s abscess: a unique complication of otitis media. Advanced pediatric mastoiditis with and without intracranial complications. Zevallos JP, Vrabec JT, Williamson RA, et al. In Baylor University Medical Center Proceedings 2012 (Vol. A pictorial review of complications of acute coalescent mastoiditis. Levine HR, Ha KY, O’Rourke B, Owens FD, Doughty KE, Opatowsky MJ. Computed tomography of temporal bone pneumatization: 2. Virapongse C, Sarwar M, Bhimani S, Sasaki C, Shapiro R. Benign lesions of the external auditory canal. Keratosis obturans and external auditory canal cholesteatoma. External auditory canal cholesteatoma: reassessment of and amendments to its categorization, pathogenesis, and treatment in 34 patients. Anatomy and inflammatory and neoplastic processes. Imaging review of the temporal bone: part I. Role of 3D CT in the evaluation of the temporal bone. 2011 32:221–9.įatterpekar GM, Doshi AH, Dugar M, Delman BN, Naidich TP, Som PM. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.Barath K, Huber AM, Stampfli P, Varga Z, Kollias S. 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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