Items tagged “ent”

30 results found
Article

Facial nerve

The facial nerve is one of the key cranial nerves with a complex and broad range of functions. Although at first glance it is the motor nerve of facial expression which begins as a trunk and emerges from the parotid gland as five branches (see facial nerve branches mnemonic), it has taste and p...
Article

Juvenile nasopharyngeal angiofibroma

Juvenile nasopharyngeal angiofibromas (JNA) are a rare benign but locally aggressive vascular tumour. Epidemiology Juvenile nasopharyngeal angiofibromas occur almost exclusively in males and usually in adolescence (~15 years). They account for only 0.5% of all head and neck tumours 2, but are ...
Article

MacEwen triangle

The MacEwen triangle (also called the suprameatal triangle or mastoid fossa) is a small triangular depression affecting the inner table of the temporal bone. The lines forming the triangle are: anterior: posterior border of the external acoustic meatus superior: posterior root of the zygomati...
Article

Otomastoiditis

Otomastoiditis, or more simply inflammation of the mastoid air cells, can be divided into two distinct entities: acute otomastoiditis: usually due to bacterial infection chronic otomastoiditis: usually due to Eustachian tube dysfunction
Article

Ranula

Ranulas are a rare benign acquired cystic lesions that occur at the floor of mouth as submandibular or minor salivary glands retention cysts.  Epidemiology For reasons that are unclear, they appear to be more common in the Maori of New Zealand and Pacific Island Polynesians 7. Clinical presen...
Article

Sialolithiasis

Sialolithiasis refers to the formation of concrements (sialoliths) inside the ducts or parenchyma of salivary glands and most commonly occurs in the submandibular glands and their ducts. Epidemiology Sialolithiasis is the most common disease of salivary glands, accounting for approximately 50%...
Article

Cochlear implant

Cochlear implants (CI) are a surgically implanted electronic device that provides a sense of sound to a person who is profoundly deaf or severely hard of hearing. Unlike conventional hearing aids, the cochlear implant does not amplify sound, but works by directly stimulating any functioning audi...
Article

Maxillary tori

Maxillary tori are analogous to mandibular tori and are composed of densely mineralised bone usually devoid of a medullary cavity. Unlike in the mandible, where they arise on the inner surface, when arising from the maxilla they may project both inwards (in which case they arise from the midline...
Article

Auditory brainstem response tracing (mnemonic)

This mnemonic helps when remembering the ascending order of structures that corresponds to each waveform in an auditory brainstem response (ABR) tracing: E COLI Mnemonic E: eighth nerve action potential (wave I) C: cochlear nucleus (wave II) O: olivary complex (superior) (wave III) L: late...
Article

Nystagmus (mnemonic)

A helpful mnemonic to remember the expected direction of nystagmus during a caloric test is: COWS Mnemonic Cold-Opposite Warm-Same Following ear stimulation with water (left ear): cold water (cooler than body temperature), a right-beating nystagmus (directed toward the opposite ear) result...
Case

Adenoid and palatine tonsil on lateral radiograph

 Diagnosis certain
Dr Maulik S Patel
Published 20 Mar 2010
79% complete
X-ray
Article

Nasopharyngeal carcinoma

Nasopharyngeal carcinomas (NPC) are the most common primary malignancy of the nasopharynx. It is of squamous cell origin, some types of which are strongly associated with the Epstein-Barr virus (EBV). Epidemiology Nasopharyngeal carcinoma accounts for ~70% of all primary malignancies of the na...
Article

Head and neck squamous cell carcinomas

Head and neck squamous cell carcinomas (HNSCC) refer to SCCs of the aerodigestive tract of the head and neck rather than cutaneous SCCs. SCC is the most common tumour of the mucosa of the upper aerodigestive tract, and can occur anywhere there is squamous cell mucosa.  Epidemiology, risk factor...
Case

Cochlear implant

 Diagnosis certain
Dr Jeremy Jones
Published 21 Dec 2010
71% complete
CT
Article

Temporal bone fractures

Temporal bone fractures are usually a sequela of significant blunt head injury. In addition to potentially damaging hearing and the facial nerve, associated intracranial injuries, such as extra-axial haemorrhage, diffuse axonal injury and cerebral contusions are common. Early identification of t...
Article

Longitudinal temporal bone fractures

Longitudinal temporal bone fractures are petrous temporal bone fractures that occur parallel to the long axis of the petrous temporal bone. Although more current classifications of the extent of temporal bone fractures focus on the integrity of the otic capsule rather than the fracture orientati...
Article

Foramen tympanicum

The foramen tympanicum (also known as foramen of Huschke) is an anatomical variation in the external acoustic canal (EAC), where a bony defect connects the EAC to the temporomandibular joint (TMJ). Epidemiology Various studies have reported on the occurrence of a foramen tympanicum in the asym...
Article

Parapharyngeal abscess

Parapharyngeal abscesses are deep neck abscesses involving the parapharyngeal space. It is a serious medical condition, potentially fatal, and requires prompt diagnosis treatment. Epidemiology A person of any age can develop a parapharyngeal abscess, but it is most commonly seen in children an...
Case

Sialolithiasis - submandibular gland

 Diagnosis almost certain
Dr Maulik S Patel
Published 06 Sep 2013
75% complete
Ultrasound
Article

Tonsillitis

Tonsillitis refers to inflammation of any of the tonsils and is one of the most common head and neck infections in adolescents and young adults. Clinical presentation Patients may present with a variety of symptoms including painful throat (may be unilateral), dysphagia, fevers, tender cervica...

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