scholarly journals Otoscopy and imaging features of spontaneous temporomandibular joint herniation into the external auditory canal

BJR|Open ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 20200005
Author(s):  
Jun-Hua Liu ◽  
Wen-Hu Huang ◽  
Jiang Hong Xu ◽  
Yin Liu ◽  
Yan Sha
Keyword(s):  
Temporomandibular Joint ◽  
External Auditory Canal ◽  
Mouth Opening ◽  
Anterior Wall ◽  
Bony Defect ◽  
Imaging Features ◽  
Soft Mass ◽  
Mri Features ◽  
Mri Scans ◽  
Ct And Mri

Objective: To explore the otoscopy, CT and MRI features of spontaneous temporomandibular joint(TMJ）herniation(STMJH) into the external auditory canal (EAC) through the persistent foramen of Huschke (PFH). Methods: 15 cases diagnosed STMJH were collected. The otoscopy, CT data of 15 cases and MRI data of 6 cases were retrospectively reviewed. Results: Otoscopy revealed a mass located in the anterior wall of the bony EAC that moved forwards and backwards during mouth opening and closing, respectively. CT showed a soft mass with bony defect in the anterior wall of the EAC, with no enhancement; the bony defect margin was well defined in all cases. The bone adjacent to the PFH was pressed and partially wrapped around the soft mass, as if “holding a ball,” in seven cases. Pseudobone shell around the soft mass was observed in eight cases. Six cases included MRI scans, which showed TMJ soft tissue herniated into the EAC. Conclusion: STMJHs have unique otoscopic, CT and MRI features. The examination strategy recommended is dynamic otoscopy and conventional CT, MRI can be chosen when the herniation is complicated by infection or otitis externa or when the patient has TMJ dysfunction; conservative management and follow-up observations are the main treatment strategy recommended. Advances in knowledge: Mechanical stress of TMJ on the EAC is thought to cause herniation and the special CT features, the location and size of the PFH, especially the location, are the major risk factors for TMJ herniation in patients with FH.

scholarly journals Head and neck osteosarcoma: CT and MR imaging features

2020 ◽  
Vol 49 (2) ◽  
pp. 20190202
Author(s):  
Zhendong Luo ◽  
Weiguo Chen ◽  
Xinping Shen ◽  
Genggeng Qin ◽  
Jianxiang Yuan ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Head And Neck ◽  
Giant Cell ◽  
High Signal ◽  
Imaging Features ◽  
Matrix Mineralization ◽  
Imaging Characteristics ◽  
Mri Features ◽  
Signal Intensities ◽  
Ct And Mri

Objective: This study aims to assess the CT and MRI features of head and neck osteosarcoma (HNO). Methods: 37 HNOs were identified, and the following imaging characteristics were reviewed on CT and MRI. Results: A total of 37 patients(age 41.5 ± 15.0 years old; 16 males, 21 females) were included in the study. Tumours occurred in the maxilla (16, 43.2%), mandible (8, 21.6%), skull base (6, 16.2%), calvarium (5, 13.5%), paranasal sinuses (1, 2.7%) and cervical soft tissue (1, 2.7%). 16 patients received radiotherapy for nasopharyngeal carcinoma. Three patients (8.1%) developed osteosarcomas related to a primary bone disease. 16 of the (43.2%) tumours demonstrated lytic density on CT scans, followed by 13 (35.1%) showing mixed density and 7 (18.9%) with sclerotic density. Matrix mineralization was present in 32 (86.5%). 3 out of 24 (12.5%) tumours showed lamellar periosteal reactions, 21 out of 24 (87.5%) showed spiculated periosteal reactions. 12 tumours showed low signal intensities on T1WI, with 16 having heterogeneous signal intensities. 10 tumours showed high signal intensities on T2WI, and 18 showed heterogeneous signal intensities. With contrast-enhanced images, 3 tumours showed homogeneous enhancement (2 osteoblastic and 1 giant cell-rich), 18 tumours showed heterogeneous enhancement (13 osteoblastic, 4 fibroblastic and 1 giant cell-rich), and 7 tumours showed peripheral enhancement (6 chondroblastic and 1 osteoblastic). These tumours were characterized by soft tissue masses with a diameter of 5.6 ± 1.8 cm. Conclusions: HNO is a rare condition and is commonly associated with previous radiation exposure. This study provides age, sex distribution, location, CT and MRI features of HNO.

Temporomandibular joint herniation and the foramen of Huschke: an unusual external auditory canal mass

2011 ◽  
Vol 125 (12) ◽  
pp. 1279-1281 ◽  
Author(s):  
S J Prowse ◽  
G Kelly ◽  
F Agada
Keyword(s):  
Temporomandibular Joint ◽  
External Auditory Canal ◽  
Soft Tissues ◽  
Anterior Wall ◽  
Ear Canal ◽  
Surgical Closure ◽  
Computed Tomographic ◽  
History Of ◽  
Temporal Bones ◽  
Foramen Of Huschke

AbstractObjectives:We describe a rare case of spontaneous temporomandibular joint herniation into the external auditory canal, and we also review the presentation, aetiology and management of such cases.Case report:An 87-year-old woman presented with a four-month history of left-sided otorrhoea and otalgia. Examination revealed a soft, polypoid mass in the left ear canal. When the patient opened her mouth the lesion disappeared. Subsequent computed tomographic imaging of the patient's temporal bones confirmed an 8.6 mm defect in the antero-inferior portion of the left ear canal, with herniation of retrodiscal soft tissues.Conclusion:The external auditory canal is intimately related to the temporomandibular joint, separated only by its bony anterior wall. Neoplasm, trauma or inflammation in this area can result in displacement of the temporomandibular joint into the ear canal; however, spontaneous herniation is rare. Persistence of the primitive foramen of Huschke can result in dehiscence of the anterior canal wall, allowing articular tissue to prolapse into the ear canal. Surgical closure of these defects is known to be effective in ameliorating symptomatic cases.

scholarly journals A Case of Bony Defect of the Anterior External Auditory Canal Wall Causing Ear Fullness

2020 ◽  
Vol 63 (3) ◽  
pp. 129-133
Author(s):  
Jong Kyou Lee ◽  
Bum Sang Lee ◽  
Soo Kyung Jang ◽  
Su-Kyoung Park
Keyword(s):  
External Auditory Canal ◽  
Bone Growth ◽  
Anatomic Variation ◽  
Anterior Wall ◽  
Surgical Reconstruction ◽  
Bony Defect ◽  
Wall Defect ◽  
Osseous Defect ◽  
Preauricular Approach ◽  
Foramen Of Huschke

A congenital defect of the anterior wall of the external auditory canal (EAC) is known as foramen of Huschke. The tympanic bone is incompletely developed and has a U shape at birth. The foramen of Huschke closes via continuous bone growth, which occurs before the age of 5 years. A persistent foramen of Huschke is an anatomic variation located in the anteroinferior portion of EAC, which can cause ear discomfort with spontaneous temporomandibular joint (TMJ) herniation into the EAC bony defect. We present a case of 50-year-old man who had a symptomatic TMJ herniation through an osseous defect. The physical examination showed a bulging mass of anterioinferior portion of EAC when the patient closed his mouth, which was retracted when the mouth openned. We report a case of surgical reconstruction of the EAC wall defect, and the foramen of Huschke with titanium mesh via preauricular approach along with literature’s review.

scholarly journals Assessment of disk displacements of the temporomandibular joint

2005 ◽  
Vol 19 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Ana Carolina Ramos Mariz ◽  
Paulo Sérgio Flores Campos ◽  
Viviane Almeida Sarmento ◽  
Maria Olívia Dias Gonzalez ◽  
Jurandyr Panella ◽  
...  
Keyword(s):  
Temporomandibular Joint ◽  
Mouth Opening ◽  
Surface Coil ◽  
Articular Disk ◽  
Significant Difference ◽  
Magnetic Field Magnitude ◽  
Mri Scans ◽  
Males And Females ◽  
Magnetic Resonance Imaging Mri ◽  
Reciprocal Clicking

The aim of the present research was to evaluate disk displacements (DDs) of the temporomandibular joint (TMJ) among patients referred for magnetic resonance imaging (MRI) scans, and analyze the type and prevalence of DD, gender, age, side distribution, reciprocal clicking, presence of pain, range of mouth opening movement, and dental condition. The sample comprised 113 patients, 12-78 years old (the age average was 36.4 ± 13.5 years), 92 females and 21 males, who underwent MRI between July 2001 and December 2002. A Signa Horizon system (GE) MRI scanner was used at a magnetic field magnitude of 1.5 T with a bilateral radiofrequency surface coil (6.5 x 6.5 cm). Twenty-three (20.4%) patients were found to be normal, whereas 90 (79.7%) presented with DD. Anterior DD (61.1%) was the most common type of articular disk displacement. Males and females were equally affected (no statistically significant difference). We did not find a statistically significant association between DD and increased age. Bilateral DD (70%) was the most common DD occurrence. We found a statistically significant association between reciprocal clicking and anterior DD with reduction. We did not find a statistically significant association between DD and pain, be it articular or facial pain, otalgia or cephalgia. We found a statistically significant association between anterior DD without reduction and mouth opening limitation. With regard to oral condition, we did not find a statistically significant association between DD and loss of teeth.

scholarly journals CT and MRI findings in Lhermitte-Duclos disease

2005 ◽  
Vol 9 (1) ◽  
pp. 30 ◽  
Author(s):  
M.R.H. Bayat ◽  
J, Sarawan
Keyword(s):  
Cerebellar Lesion ◽  
Imaging Features ◽  
Mri Findings ◽  
Mri Features ◽  
Ct And Mri

Lhermitte-Duclos disease (LDD) is arare cerebellar lesion of uncertain origin.It is linked to an autosomal- dominantphakomatosis known asCowden’s disease in 40% of patients.The MRI features of LDD are almostunique and can be considered diagnostic.We report on a patient whopresented with the typical MRI featuresof the above disease, and discussthe imaging features, pathology andgenetics.

Ganglion Cyst Presenting as an External Auditory Canal Mass

2021 ◽  
pp. 014556132110414
Author(s):  
Aaron M. Domack ◽  
Aayushma Regmi ◽  
John P. Leonetti
Keyword(s):  
Skull Base ◽  
Temporomandibular Joint ◽  
External Auditory Canal ◽  
Ganglion Cyst ◽  
Benign Lesion ◽  
Anterior Wall

A ganglion cyst of the temporomandibular joint is a benign lesion that may present as a mass on the anterior wall of the external auditory canal and should be differentiated from other skull base pathology prior to management.

Paranasal Sinus Mucocele Clinical, imagistic and biochemical aspects

2018 ◽  
Vol 69 (8) ◽  
Author(s):  
Doina Vesa ◽  
Cristian Martu ◽  
Razvan Leata ◽  
Ludmila Lozneanu ◽  
luminita Radulescu ◽  
...  
Keyword(s):  
Facial Asymmetry ◽  
Retrospective Case ◽  
Mri Scans ◽  
The One ◽  
Ethmoid Sinuses ◽  
Retrospective Case Study ◽  
Cellular Components ◽  
Ct And Mri

Paranasal mucoceles are a type of cysts that evolve slowly and are asymptomatic; this poses a difficulty in diagnosing the patient because the symptoms can go unnoticed. The mucocele evolves unpredictably. On the one hand, it can become infected turning into pyoceles and on the other hand, it can invade important regions such as the orbital, cranial or genian regions, creating facial asymmetry. This is a retrospective case study of 37 patients diagnosed with sinus mucoceles, followed up by clinical examination and paraclinical tests such as CT and MRI scans. The biochemical components of the liquid from within the mucocele were analyzed and the following criteria were recorded: NaCl-, Cl-, Na+ and cholesterine as well as cellular components such as mastocytes, macrophages, hematocytes and leucocytes. In all cases, the treatment option was surgery with favorable post-operative and follow-up evaluation. The mucoceles that appeared post-operatively (maxillary and ethmoid sinuses) evolved more rapidly than the mucoceles that were induced byan external injury. Longer follow-up of operated patients permitted a more timely diagnosis of recurrences.

Myxofibrosarcoma: clinical and prognostic value of MRI features

2020 ◽  
Vol 16 ◽  
Author(s):  
Paolo Spinnato ◽  
Andrea Sambri ◽  
Tomohiro Fujiwara ◽  
Luca Ceccarelli ◽  
Roberta Clinca ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Local Recurrence ◽  
Contrast Enhancement ◽  
Imaging Modality ◽  
Soft Tissue Sarcomas ◽  
The Elderly ◽  
High Rate ◽  
Imaging Features ◽  
High Grade ◽  
Mri Features

: Myxofibrosarcoma is one of the most common soft tissue sarcomas in the elderly. It is characterized by an extremely high rate of local recurrence, higher than other soft tissue tumors, and a relatively low risk of distant metastases.Magnetic resonance imaging (MRI) is the imaging modality of choice for the assessment of myxofibrosarcoma and plays a key role in the preoperative setting of these patients.MRI features associated with high risk of local recurrence are: high myxoid matrix content (water-like appearance of the lesions), high grade of contrast enhancement, presence of an infiltrative pattern (“tail sign”). On the other hand, MRI features associated with worse sarcoma specific survival are: large size of the lesion, deep location, high grade of contrast enhancement. Recognizing the above-mentioned imaging features of myxofibrosarcoma may be helpful to stratify the risk for local recurrence and disease-specific survival. Moreover, the surgical planning should be adjusted according to the MRI features

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