ENT lesions Flashcards
Anterior triangle
- Superiorly – inferior border of the mandible (jawbone).
- Laterally – anterior border of the sternocleidomastoid.
- Medially – sagittal line down the midline of the neck
Posterior border of the sternocleidomastoid
* The anterior border of the trapezius
* Middle third of the clavicle
Salivary glands : Types
3 pairs
* parotid (serous) - most tumours, large serous salivary gland anterior and inferior to the ear
* submandibular (mixed) - most stones, mixed serous and mucous salivary gland
Forms majority of saliva when not eating
- sublingual (mucous)
Benign Salivary adenomas : Clinical features
Slowly growing painless mass
Facial palsies suggest malignancy.
1. Pleomorphic - most common
2. Adenolymphoma - second most common
Pleomorphic adenomas
(benign, ‘mixed parotid tumour’, 80%)
Most common being parotid tumor
* tumours: ‘80% parotid, 80% of these = pleomorphic adenomas, 80% superficial lobe
* middle age
* slow growing, painless lump
* superficial parotidectomy; risk = CN VII damage
Mx : Has potential for malignant transformation thus requires Surgical excision
adenolymphomas
Warthin’s tumour (benign, ‘adenolymphomas’, 10%)
is a type of benign salivary gland tumor. It most commonly occurs in the parotid gland,
which is the largest of the salivary glands located near the ear.
* males, middle age
* softer, more mobile and fluctuant (although difficult to differentiate)
Salivary stones
- recurrent unilateral pain & swelling on eating
- may become infected → Ludwig’s angina
- 80% are submandibular
- plain x-rays; sialography
- surgical removal
Sialilithiasis
Submandibular stone - presents with infection, shooting pain and swelling
Ix - A-ray
Mx - salivary dilatation and massage
Salivary stone infection
Acute vital sialdenitis
Mumps - viral cause of bilateral parotid gland enlargements
Enlarged purulent parotid glands - Sarcoidosis
Other causes of Salivary gland swelling
Other causes of enlargement
* acute viral infection e.g. mumps
* acute bacterial infection e.g. 2nd to dehydration diabetes
* sicca syndrome and Sjogren’s (e.g. RA)
Salivary gland tumores - Red flags
- Hardness
- Rapid growth
- Tenderness
- Infiltration of surrounding structures
- Overlying skin ulceration
- Facial weakness
Salivary gland malignancues
Paratidectomy
Indic : Neoplasms (benign & malignant)
1. Superficial/Total conservative : excision of lesion with preservation of facial nerve
2. Total radical parotidectomy (involves sacrifice of the facial nerve and may be combined with a nerve graft)
Branchial cyst
Upper neck masses in adults - often around 20-30 years
Soft cystic
Lateral border of neck, anterior/medial border of sternocleidomastoid
Ix - Neck US and FNAC
Mx - Surgical excision
Dysphonia : Causes
Dysphonia : horseless, altered vocal quality, pitch and loudness
Causes
1. Malignant e.g. squamous cell carcinoma
1. Benign e.g. vocal cord nodules, papillomas, or cysts
1. Neuromuscular e.g. Vocal cord palsy
1. Trauma e.g. surgery, intubation, excess use
1. Endocrine e.g hypothyroidism
1. Infective e.g. laryngitis, candida (inhaled corticosteroids may predispose to this)
1. Iatrogenic e.g. recurrent laryngeal nerve palsy secondary to thyroid surgery Functional e.g. muscle tension dysphonia
Dysphonia Ix :
- Flexible nasendoscopic examination of larynx
- TFTs
Red flags with dysphonia
- History of smoking and alcohol use
- Concomitant neck mass
- Unexplained weight loss
- Accompanying neurological symptoms **Accompanying haemoptysis,
- dysphagia, odynophagia, otalgia**.
- Hoarseness that is persistent and worsening (rather than intermittent)
- Hoarseness in an immunocompromised patient
Pharyngeal pouch : Definition
Zenker’s diverticulum, this is an out-pouching of the mucosa and submucosa in the pharynx. It occurs between 2 muscles (cricopharyngeus and thyropharyngeus) of the upper oesophageal sphincter
Pharyngeal pouch :Epidemiology
More common in elderly men
Pharyngeal pouch : Clinical features
- May be asymptomatic if small
- **Progressive dysphagia **
-
Sensation of lump in throat
1.** Regurgitation of undigested food Halitosis** (bad breath due to stasis of undigested food in pouch) Recurrent chest infections
Pharyngeal pouch : Ix and Mx
Barium swallow is the definitive investigation.
Rigid oesophagoscopy may be useful to exclude carcinoma of the pouch wall.
If asymptomatic- conservative management.
If symptomatic, particularly if risk of aspiration and recurrent pneumonia- endoscopic stapling is the first line.
Globus Pharyngeus
This is the sensation of a lump, discomfort or foreign body in the throat without an obvious cause.
It is a diagnosis of exclusion, linked to stress or anxiety and a form of somatization.
t is associated with laryngopharyngeal reflux (30%)
Globus Pharyngeus : Investigations
Flexible nasopharyngolaryngoscopy to rule out other causes. If there is a history of smoking or excess alcohol consumption, consider a barium swallow, CT scan or upper GI endoscopy to exclude oesophageal patholog
Thyroid masses Investigations
- US of neck to stratify lesions
Red flags on US - Solid hypoechogenic nodule with micro calcifications, irregular margins
- Lymphadenopathy
If red flags
1. US guided fine needle aspiration cytology
Thyroglossal cyst or sinus
Cyst of epithelial remnants of the thyroglossal tract
Most commonly in children. But 1/3 present in over-20s. Most common congenital cyst in neck.
Embryological remnant of thyroglossal tract during descent of the thyroid from the foramen caecum at the tongue base
Thyroglossal cyst or sinus : Symptoms
Often asymptomatic
. May enlarge/become tender in upper respiratory tract infections May become infected, form an abscess or discharging sinus
Palpable neck lump, small, midline
. Can occur anywhere between base of tongue and trachea Usually in proximity to the hyoid bone Moves up on tongue protrusion and swallowing
Thyroglossal cyst or sinus : Mx
USS +/- Fine needle aspiration cytology. Delineates anatomy and demonstrates normal thyroid gland. Must ensure that thyroid gland is present. Removal of the only thyroid tissue in thyroglossal cysts renders patient hypothyroid
** Treatment** Most require no treatment unless there are complications e.g recurrent infections.
Surgical treatment (Sistrunk’s procedure) entails excision of cyst, thyroglossal tract and central portion of hyoid bone
Thyroid cancer
Risk factors
Exposure radiation
Women
Family history
Thyroid nodule : US staging
Thyroid nodules undergo further cytological classification, which is called THY,
* * THY1: non diagnostic due to lack of cellularity. THY2: non-neoplastic.
* THY3: follicular lesion. surgical resection of the nodule (lobectomy) to distinguish between a follicular adenoma and carcinoma (as cytology insufficient to assess perivascular or pericapsular invasion).
* . THY4: Suspicious but non-diagnostic of malignancy. Surgery is indicated as there is a 60-75% risk of malignancy. If the results are non-diagnostic and medullary carcinoma or lymphoma are suspected, then the FNAC should be repeated.
* THY5: Diagnostic of malignancy MDT will recommend appropriate combination of surgery +/- radiotherapy +/- chemotherapy if indicated
Papillary thyroid cancer : Epidemiology
- Most common 85%
- Adolescents, young adults 34-40 years
- RF : Radiation
Papillary thyroid cancer : Pathology and spread
Multifocal papillary structure, Psomma bodies, Lymphatic invasion
Spread : Lymphatic, cervical lymph nodes
Papillary thyroid cancer : Presentation
- Solitary or multiple nodules
- Painless
- Cold - euthyroid
- Cervical lymphadenopathy
Papillary thyroid cancer : IX
- USS
- FNAC - This can diagnose papillary carcinoma but cannot distinguish follicular adenoma (benign) from follicular carcinoma therefore the entire nodule must be assessed (by performing a diagnostic hemithyroidectomy)
- SCinotography - cold nodules
- Non contrast CT of Neck and chest
Follicular thyroid cancer : Epidemiology
2nd most common thyroid ca - 5-15%
Middle aged and older adults
RF : Iodine deficiency
Follicular thyroid cancer : Genetic
RAS proto-oncogene mutlatiion
Follicular thyroid cancer : Pathology and spread
Unifocal, Haemorrhage
Haemategenous spread : brain, bone, lungs, liver
Follicular thyroid cancer : Presentation
- Slowly enlarging painless solitary nodule
- Euthyroid
- Evidence of metastases