ENT Flashcards
What is the eustachian tube?
Connects middle ear to throat to equalise pressure
What are the 3 small bones of the ear called?
Malleus, incus, stapes
What is the role of the semicircular canals?
Sense head movement (vestibular system)
What is the role of the cochlea?
Converts sound vibration to nervous signal
What is a normal Weber’s?
Equal in both ears
What is seen in sensorineural hearing loss in Weber’s?
Sound louder in normal ear
What is seen in conductive hearing loss in Weber’s?
Sound louder in affected ear
Why in conductive hearing loss is the sound louder in affected ear in Weber’s?
Affected ear ‘turns up the volume’ and becomes more sensitive
What is Rinne’s positive?
Normal- Air conduction better than bone
What is Rinne’s negative?
Abnormal- Bone conduction better than air- Suggests conductive cause
List medications that can cause sensorineural hearing loss
Loop diuretics- Furosemide
Aminoglycosides- Gentamicin
Chemotherapy- Cisplatin
List neurological conditions that can cause sensorineural hearing loss
Stroke
MS
Brain tumour
List causes of conductive hearing loss
Tumour, exostoses, cholesteatoma, otosclerosis, perforated tympanic membrane, eustachian tube dysfunction, fluid in middle ear, otitis externa/media, ear wax
What is leukoplakia?
White patches in mouth
Precancerous- Increased risk SCC of mouth
What are the characteristics of leukoplakia?
Asymptomatic patches
Irregular
Slightly raised
Not able to scrape off
Outline management of leukoplakia
Biopsy to exclude abnormal cells
Stop smoking, reduce alcohol intake, close monitoring
Potentially laser removal or surgical excision
What are erythroplakia?
Similar to leukoplakia, but lesions are red
What is lichen planus?
Autoimmune condition
Causes localised chronic inflammation
Outline characteristics of lichen planus
Shiny, purplish, flat-topped raised areas with white lines across surface- Wickham’s striae
Occurs in >45y women
What are the 3 potential patterns of lichen planus in the mouth?
Reticular- Wickham’s striae
Erosive lesions- Surface of mucosa eroded- Bright red sore areas
Plaques- Large continuous areas of white mucosa
Outline management of lichen planus
Good oral hygiene, stop smoking
Topical steroids
What is gingivitis?
Inflammation of gums
How does gingivitis present?
Swollen gums
Bleeding after brushing
Painful gums
Bad breath (halitosis)
What is a key complication of gingivitis?
Periodontitis
What is periodontitis?
Severe and chronic inflammation of gums and tissue that support the teeth
Can lead to loss of teeth
What is acute necrotising ulcerative gingivitis?
Rapid onset of severe inflammation in gums
Painful
Caused by anaerobic bacteria
What is the key difference in presentation of gingivitis and acute necrotising ulcerative gingivitis?
ANUG is painful and caused by anaerobic bacteria
List the risk factors for gingivitis
Plaque build up (inadequate brushing)
Smoking
Diabetes
Malnutrition
Stress
What is tartar?
A sawce
Hardened plaque
Outline management of gingivitis
Dentist
Good oral hygiene
Stop smoking
Chlorhexidine mouthwash
Outline management of acute necrotising ulcerative gingivitis
Antibiotics (metronidazole)
What is gingival hyperplasia?
Abnormal growth of gums
Gums notably enlarged around teeth
What are the causes of gingival hyperplasia?
Gingivitis
Pregnancy
Vit C deficiency (scurvy)
Acute myeloid leukaemia (AML)
Meds- CCBs, phenytoin, ciclosporin
What can a vit C deficiency cause?
Scurvy
What are aphthous ulcers?
Very common, small, painful ulcers of mucosa in mouth
Well-circumscribed, punched-out, white appearance
What are the causes of aphthous ulcers?
Emotional or physical stress
Trauma to mucosa
Particular foods
What underlying conditions could aphthous ulcers suggest?
IBD (Crohn’s disease, UC)
Coeliac disease
Behcet disease
Vit deficiency (iron, B12, folate, vit D)
HIV
Outline initial management of Aphthous ulcers
Usually heal within 2wks
Bonjela (choline salicylate)
Benzydamine (Difflam spray)
Lidocaine
Outline management of severe aphthous ulcers
(each is applied to lesion, not swallowed)
Hydrocortisone buccal tablets
Betamethasone soluble tablets
Beclomethasone inhaler
How would you manage unexplained ulceration lasting over 3wks?
2wk wait
What causes a black, hairy tongue?
Decreased exfoliation of keratin from tongue’s surface
Papillae elongate and take on appearance of hair
Bacteria and food cause dark pigmentation
What are the causes of black hairy tongue?
Dehydration
Dry mouth
Poor oral hygiene
Smoking
What are the symptoms of a black hairy tongue?
Sticky saliva
Metallic taste
What is the management of a black hairy tongue?
Hydration
Gentle brushing of tongue
Stop smoking
What is strawberry tongue?
Tongue swollen and red
Papillae become enlarged, white and prominent
What are the causes of strawberry tongue?
Scarlet fever
Kawasaki disease
What is a geographic tongue?
Inflammatory condition where patches of tongue’s surface lose epithelium and papillae
Patches form irregular shape on tongue
What is the progression of a geographic tongue?
Relapses and remits
What are the associations of geographic tongue?
Sometimes none
Stress and mental illness
Psoriasis
Atopy (asthma, hayfever, eczema)
Diabetes
What is the prognosis of geographic tongue?
Benign
Doesn’t cause harmful effects
What is the management of geographic tongue?
No treatment required
If discomfort/burning- Treat with topical steroids or antihistamines
What is oral candidiasis?
Oral thrush
Overgrowth of candida- Fungus
How does oral candidiasis present?
White spots/patches that coat surface of tongue and palate
What are the risk factors that predispose a patient to oral candidiasis?
Inhaled corticosteroids (poor technique, not using a spacer, not rinsing with water)
Antibiotics (disrupt normal flora)
Diabetes
Immunodeficiency (consider HIV)
Smoking
Outline the management of oral candidiasis
Miconazole gel
Nystatin suspension
Fluconazole tablets (severe/recurrent)
What is angioedema?
Accumulation of fluid in tissues resulting in swelling
Can affect limbs, face, lips, and tongue
What are the top 3 causes of angioedema?
Allergic reactions
ACE-is
C1 esterase inhibitor deficiency (hereditary)
What is glossitis?
Inflamed tongue
Tongue swollen, red and sore
Papillae of tongue atrophy- Gives tongue smooth appearance
What are the causes of glossitis?
Iron deficiency anaemia
B12 deficiency
Folate deficiency
Coeliac disease
Injury or irritant exposure
What is the most common type of head and neck cancer?
Squamous cell carcinoma
List the potential areas of head and neck cancer
Nasal cavity
Paranasal sinuses
Mouth
Salivary glands
Pharynx
Larynx (epiglottis, supraglottis, vocal cords, glottis and subglottis)
Where do head and neck cancers usually spread to first?
Lymph nodes
What are the risk factors for head and neck cancer?
Smoking
Chewing tobacco
Chewing betel quid
Alcohol
HPV 16
EBV infection
List the red flags that may indicate head and neck cancer
Lump in mouth/on lip
Unexplained ulceration in mouth >3wks
Erythroplakia/erythroleukoplakia
Persistent neck lump
Unexplained hoarse voice
Unexplained thyroid lump
Outline management of head and neck cancer
TNM staging system- Grades tumour, node involvement and metastasis
Chemo/radiotherapy
Surgery
Targeted cancer drugs (monoclonal antibodies)
Palliative care
Give an example of a monoclonal antibody used to treat squamous cell carcinomas of head and neck
Cetuximab- Targets and blocks epidermal growth factor receptor and inhibits growth and metastasis of tumour
(can also treat bowel cancer)
What are the borders of the anterior triangle?
Mandible forms superior border
Midline of neck forms medial border
SCM forms lateral border
What are the borders of the posterior triangle?
Clavicle forms inferior border
Trapezius forms posterior border
SCM forms lateral border
List differential diagnoses of neck lumps in adults
Normal structures (eg: Bony prominence)
Skin abscess
Lymphadenopathy (enlarged lymph nodes)
Tumour (eg: Squamous cell carcinoma or sarcoma)
Lipoma
Goitre (swollen thyroid gland) or thyroid nodules
Salivary gland stones or infection
Carotid body tumour
Haematoma (collection of blood after trauma)
Thyroglossal cysts
Branchial cysts