Head and neck | Flashcards
Head and neck cancer include tumours that develop in which areas (6)?
- Oral cavity
- Pharynx
- Paranasal sinuses
- Nasal cavity
- Larynx
- Salivary glands
What are risk factors for developing head and neck cancers (7)?
- Male
- Increasing age
- Smoking/chewing tobacco or betal nuts
- Excessive alcohol
- Sun exposure - inc risk in lip, ears and skin of head+neck
- Breathing in certain chemicals and hardwood dusts - inc risk in nose/sinuses
- Presence of leukoplakia
Which type of cancer is more common among smokers, and those who drink lots of alcohol?
SCC
What are leukoplakia?
White spots of patches in the mouth which become cancerous in 1/3 patients
What types of cancers arise in the head and neck (6)? Which is most common?
- SCC -> most common
- Lymphoma (most often diffuse non-Hodkins lymphoma)
- Salivary gland tumours (include adenoid cystic, mucoepidermoid, acinic cell)
- Thyroid (papillary, follicular, medullary and anaplastic carcinomas)
- Sarcomas
- Undifferentiated carcinomas
What are the common symptoms of head and neck cancer (10)?
- Persistent pain in throat
- Bleeding in mouth or throat
- Persistent hoarseness or change in voice
- Persistent ulceration, leukoplakia or erythroplakia
- Odynophagia
- Dysphagia
- Referred pain to ear
- Enlarging neck node
- Weight loss
- Check for airway compromise
What are erythroplakia?
Red patches in the mouth (on a mucous membrane) that are not attributed to any other pathology. These are pre-malignant lesions
What should be done if a white or red lesion is present in the mouth for longer than 2 weeks?
It should be evaluated by a specialist and considered for biopsy
When does weight loss occur with head and neck cancers?
It is usually 2o to dysphagia or odynophagia
If weight loss is a predominant symptom, what malignancies should be considered?
Lung, stomach or other systemic cancers
What are some other symptoms that a patient may complain of with head and neck cancer (6)?
- Lump or thickening in oral soft tissues
- Soreness or feeling that something is stuck in the throat
- Difficulty chewing or opening of mouth
- Difficulty moving the tongue
- Numbness of the tongue or other parts of the mouth
- Swelling of the jaw that causes denture to fit poorly or become uncomfortable
What is done to diagnose head and neck cancers (2)?
- History and examination of upper aerodigestive tract
- Investigations:
- Bloods (U&E, FBC, LFT, glucose, albumin, TFT)
- ECG
- Fine needle aspiration for cytology (FNAC) of neck nodes/lumps (may be done under US/CT guidance)
- BIOPSY of identified suspected cancerous lesions or tumours
- CT/MRI of neck from skull base to thoracic inlet
- CXR or CT chest
-Assessment of nutritional status
What must be performed to confirm diagnosis of head and neck cancers?
Biopsy of any identified suspected cancerous lesions or tumours.
Involves detailed examination of the upper aerodigestive tract (panendoscopy) with biopsies of any suspicious areas usually under GA
What investigations are done for head and neck cancers (7)?
- (FNAC) of neck nodes/lumps
- Biopsy of tumours
- CT/MRI of neck from skull base to thoracic inlet
- CXR or CT chest
- Bloods (U&E, FBC, LFT, glucose, albumin, TFT)
- ECG
- Assessment of nutritional status
According to NICE guidelines, what are the criteria for people with suspected laryngeal cancer to be on the 2ww cancer pathway referral (2)?
Consider 2ww referral for laryngeal cancer in people aged 45 or over with:
- persistent unexplained hoarseness or
- an unexplained lump in the neck
According to NICE guidelines, what are the criteria for people with suspected oral cancer to be on the 2ww cancer pathway referral (2)?
- Unexplained ulceration in the oral cavity lasting for more than 3 weeks or
- A persistent and unexplained lump in the neck
According to NICE guidelines, what are the criteria for people with suspected oral cancer to be considered for an urgent referral (by 2 weeks) with the dentist (2)?
- a lump on the lip or in the oral cavity or
2. a red or red and white patch in the oral cavity consistent with erythroplakia or erythroleukoplakia
According to NICE guidelines, what are the criteria for people with suspected thyroid cancer to be on the 2ww cancer pathway referral?
Unexplained thyroid lump
What are red flags in head and neck cancer (7)?
- Unexplained neck lump
- Persistent unexplained hoarseness of voice
- Unexplained lump on lip/oral cavity
- Red/white patches in oral cavity >3weeks
- Dysphagia
- Cranial nerve involvement
- Persistent unilateral otalgia with normal otoscopy
How do oral cavity carcinomas present early (5) and late (2)?
Early:
- Non-healing ulcers
- Exophytic lesions in mouth
- Local pain
- Referred otalgia
- Loose teeth or poor fitting dentures
Later:
- Spread to lymph nodes
- Affects speech, swallowing , taste and appearance
What are the treatment options for oral cavity carcinomas cancers (2)?
- Surgery to primary site +/- neck
2. Adjuvant post op radiotherapy for patients at risk
What is the main type of cancer in the oropharynx?
SCC
What are the main presenting features of oropharynx tumours (9)?
- Sore throat/referred otalgia
- Odynophagia
- Dysphagia or sensation of mass in the throat
- Bleeding
- Change of voice
- Trismus
- Weight loss
- Can be asymptomatic with mass in the neck
- Obvious lesion - enlarged or ulcerated tonsil
What is the treatment of oropharyngeal cancer (2)?
- Planned combined surgery with adjuvant radiation
2. Radiation or chemoradiation with surgery for salvage
What is the challenge in treating oropharyngeal cancer?
Preserving speech and swallowing function
What are risk factors for oropharynx/hypopharyngeal tumours (5)?
- Smoking and alcohol abuse
- Betal-nut chewing
- Radiation
- Iron-deficiency anaemia
- HPV infection
What are the main presenting features of hypopharyngeal tumours (7)?
Does it usually present early or late?
Usually presents late
- Sore throat/foreign body sensation in the throat
- Hoarseness
- Odynophagia
- Increasing dysphagia with weight loss
- Stridor
- Otalgia
- Neck mass
What is the main type of hypopharyngeal tumour?
SCC
How are hypopharyngeal tumours treated?
- Early (1)
- Advanced (3)
Early
1. Radiation
Advanced
- Total laryngectomy +/- postoperative radiation
- Primary radiation with surgery for salvage
- Concurrent chemoradiation with surgery for salvage
What is the main type of laryngeal tumour?
SCC
What are risk factors for laryngeal tumour (3)?
- Smoking
- Alcohol abuse
- Previous neck radiation
What are the various locations of laryngeal cancer (3)?
- Glottis
- Supraglottic
- Subglottis (cancer here rare)
What are the clinical features of glottic cancer?
- Early (2)
- Late (4)
Do they usually present early or late?
Usually present early with good prognosis
Early
- Change in voice: constant gruff voice, progressive or hoarseness
- Rarely spread to lymph nodes
Later invade supraglottis or subglottis:
- Airway obstruction - dyspnoea/stridor
- Pain
- Dysphagia
- Spread to regional lymph nodes
What are the clinical features of supraglottic cancer (5)?
Does it usually present early or late?
Often presents late
- Local pain
- Referred otalgia
- Change in voice
- dysphagia
- Frequently spread to lymph nodes
What are the treatment options for early (3) and advanced (3) laryngeal cancer?
Early:
- Transoral laser resection
- Radiation
- Partial laryngectomy (rarely)
Advanced:
- Total larygectomy +/1 postoperative radiation
- Primary radiation with surgery for salvage
- Concurrent chemoradiation with surgery for salvage
What is the difference between a laryngectomy and a tracheostomy?
In laryngectomy, the trachea is brought to the skin, and there is no airway above the stoma. May need moisture exchange device or a speaking valve, may not need a tube.
In tracheostomy, the trachea and airway are all there, but there is a window in the trachea. Always needs a tube
What are the different histologies of thyroid cancer (3)?
- Papillary and follicular cancer (differentiated)
- Anaplastic (undifferentiated)
- Medullary (from parafollicular C cells – calcitonin)
What are risk factors for thyroid cancer (3)?
- MEN I/II
- Previous radiation exposure
- Thyroiditis is a risk factor for thyroid lymphoma
How do thyroid cancers present (3)?
- Neck lump in thyroid area
- May have airway compromise due to invasion of trachea
- May have vocal cord palsy due to invasion of recurrent laryngeal nerves
What investigations are done for thyroid cancers (3)?
- USS
- +/- FNA
- If FNA says “follicular”, you will need a diagnostic hemithyroidectomy to distinguish between follicular adenoma from carcinoma
NB. no such thing as a papillary adenoma, only carcinoma
What are the treatment options for papillary and follicular thyroid cancer (2)?
What is the prognosis?
- Total (usually) thyroidectomy and central compartment neck dissection
- +/- radio-iodine
Good prognosis
What is the treatment of medullary thyroid cancer?
Surgery
What is the treatment of anaplastic thyroid cancer?
Palliative
What members of the MDT are needed in the assessment and management of head and neck cancer (4)?
- Oncologists
- Speech therapists - swallowing and speech
- Dietician
- Specialist nurse - laryngectomy care
What is vocal cord motion impairment?
Uncoordinated movements of the vocal cord which can lead to dyspnoea
Weak voice?
Damage to the recurrent laryngeal nerve - it supplies the posterior cricoarytenoid muscle which is the sole muscle responsible for opening the vocal cords
What is the recurrent laryngeal nerve a branch of and what does it supply?
Branch of the vagus nerve (cranial nerve X)
Supplies all the intrinsic muscles of the larynx, with the exception of the cricothyroid muscles
What are the 3 major salivary glands?
- Parotid
- Submandibular
- Sublingual
Which nerve divides the parotid gland into superficial and deep lobes?
Facial VII nerve
What structures pass through the parotid gland (6)?
- Facial nerve trunk and its 5 major branches
- Retromandibular vein
- External carotid artery dividing into terminal superficial temporal and maxillary arteries
- Parotid duct - leaves gland anteromedially passing through buccinator then medially to anterior border masseter: exits in mouth at level of upper 2nd molar
- Sympathetic fibres
- Secretemotor fibres from inferior salivary nucleus and otic ganglion
Where is the submandibular gland?
Fills the submandibular triangle below mandible
Which main structures pass through the submandibular gland (3)?
- Lingual and hypoglossal nerves are in close proximity to the deep surface
- Secretemotor fibres
- Sympathetic fibres
Where is the sublingual gland?
Floor of the mouth
What are the types of fluid that each of the main salivary glands secrete (3)?
Parotid - serous
Submandibular - mixed
Sublingual - mucus
What is the physiology of saliva production?
Varying proportions of serous and mucous cells are clumped together forming acini. These are surrounded by myoepithelial cells which are drained by short intercalated ducts. These in turn drain into striated ducts then excretory ducts before exiting into the main ducts.
Which cells are thought to be where salivary neoplasms originate from?
Reserve cells - found in the intercalated and excretory duct systems. They have the capacity to differentiate into different duct cell types.
What is the excretion of saliva controlled by (2)?
- Basal secretion of saliva
2. Regulation under neurotransmitter control via the ANS
What stimulates saliva production (5)?
- Smell
- Taste
- Psychic stimuli
- Chewing and mastication
- Parasympathomimetic drugs
What are the different kinds of pathology that can occur with salivary glands (7)?
- Inflammatory
- Infective: mumps, bacterial
- Sjorgens, sarcoid
- Stones
- Neoplastic
- Benign (pleomorphic adenoma, Warthin’s tumour)
- Carcinoma (mucoepidermoid, adenoid cystic, acinic)
What are the causes of parotitis (inflammation of the parotid gland) (4)?
- Viral (mumps, HIV)
- Bacterial (often staphlococcal)
- Fungal (candidiasis, but rare)
- Other
- Sarcoid
- Drugs (dextroprophoxyphene - opioid)
How does parotitis caused by HIV present?
Diffuse enlargement of the gland with multiple cysts
How do you investigate and treat parotitis caused by mumps?
Mumps titres
Treat with analgesia and hydration
How do patients with parotitis caused by a staphylococcal infection present (3)?
- Usually debilitated
- May be on anticholinergics
- Dehydrated
How do patients with parotitis caused by a staphlococcal infection get treated (2)?
- Sialogogues - drug that increases flow rate of saliva
2. Massage or drain pus if present
In what group of people do parotitis caused by a fungal infection occur in?
Immunocompromised
What is sarcoid of the parotid glands?
Sarcoidosis is a disease involving abnormal collections of inflammatory cells that form lumps known as granulomas
What is sialectasis and sialolithiasis?
What are the clinical features of sialolithiasis (2)?
Sialectasis: cystic dilation, stenosis and necrosis of the ducts of salivary glands (unknown cause).
It is the initial event in sialolithiasis (stones) 85% of which affect the submandibular gland duct
- Pain and swelling of the affected salivary gland (most commonly in submandibular), both of which get worse when salivary flow is stimulated
- Inflammation or infection of the gland may develop as a result
How is sialectasis and sialolithiasis investigated (2)and treated (3)?
Investigate with:
- plain x-ray
- sialogram ( radiographic examination of the salivary glands)
Treat with:
- Remove stone
- Marsupialise (surgically stitch open) duct
- Occasionally gland needs to be excised
What is Sjogren’s syndrome?
Long-term autoimmune disease in which the moisture-producing glands of the body are affected resulting primarily in the development of a dry mouth and dry eyes. There is a chance of developing lymphoma
What are the 4 classifications of Sjogen’s syndrome?
- Primary - dry eyes and mouth
- Secondary - dry eyes, mouth and connective tissue disease
- Benign lymphoepithelial lesion = prelymphomatous condition
- Aggressive lymphocytic behaviour confined to parotid glands
What are the symptoms of Sjogren’s syndrome (4)?
- Dry eyes, keroconjunctivitis
- Dry mouth, glossitis, 2o candidiasis, stomatitis, dental caries
- Dry vagina
- 40% have a parotid gland enlargement, only 20% show it
What is the risk with Sjogren’s syndrome?
1 in 6 will develop non-Hodgkin’s B-cell lymphoma also Waldenstrom’s Macroglobulinaemia and lymphoblastic sarcoma
What are the investigations for Sjogren’s syndrome (6)?
- HLA AI B8 ad DR3 (present esp in primary Sjogren’s)
- Specific antigens: SSA and SSB
- Schirmer’s test for lacrimation
- Carlsson-crittendon fro salivary flow
- Labial biopsy - diagnostic test for Sjogren’s
- Rapid growth: Diagnostic parotidectomy
What is the treatment of Sjogren’s syndrome (2)?
- Steroids for bouts of parotid swelling
2. Artificial tears, saliva, lubricants
What % of salivary tumours occur in the parotid and what % of these are benign?
80% salivary tumours occur in the parotid
80% of these are benign
What % of submandibular tumours are benign?
60%
What % of minor salivary gland tumours are benign?
30%
What % of minor salivary gland tumours away from the mouth and oropharynx are malignant?
100%
What types of benign salivary gland tumours are there and how common are they (3)?
- Pleomorphic adenomas (60-70%)
- Warthin’s tumour or adenolymphoma (2-6%) - not a lymphoma
- There are 7 other types of adenoma in salivary glands which are rare
What cells do pleomorphic adenomas arise from?
What do they look like histologically (3)?
Intercalacted duct reserve cells (progenitor cells for ductal cells and myoepithelial cells)
- Usually in superficial lobe, often in tail of gland
- Macroscopically: grey/blue cut surface, cystic, lobulated
- Mixed cell tumour
What are the investigations for a pleomorphic adenoma (2)?
- Fine needle aspiration cytology
2. USS/CT
What is the treatment of pleomorphic adenomas?
Superficial parotidectomy or tumour excision with complete cuff of normal tissue.
Occasionally total parotidectomy
What cells do Warthin’s tumours arise from?
How do they present (3)?
Probably parotid lymph nodes
- Soft, cystic masses in tail of parotid
- May be bilateral
- More often i males >40yo
What is the treatment of Warthin’s tumours?
Superficial parotidectomy or tumour excision with complete cuff of normal tissue.
Occasionally total parotidectomy
What tumours of variable malignancy and clinical behaviour can be found in salivary glands (2)?
- Mucoepidermoid carcinoma
2. Acinic cell
What cells do mucoepidermoid carcinomas arise from (2)?
- From epithelial cells of interlobar and intralobular ducts
- 90% found in parotid gland
What groups of people are mucoepidermoid carcinomas more common in (3)?
- Highest prevalence in 5th decade
- Most common salivary gland carcinoma in children
- More common in females
How do different grades of mucoepidermoid carcinomas behave over time (3)?
- Low grade = well-differentiated tumours grow slowly and painlessly
- High grade = poorly-differentiated tumours grow rapidly, painfullym invade local structures and metastasise to local lymph nodes, lungs, bones and brain
- Some are intermediate in differentiation
How are mucoepidermoid carcinomas treated?
- Low grade (2)
- High grade (2)
Low grade
- local resection and
- prolonged follow up
High grade
- Radical resection and
- adjuvant radiotherapy
What cells do acinic cell tumours arise from?
What are their clinical features (3)?
Reserve epithelial cells of terminal or intercalated ducts
- Can occur bilaterally (3%)
- Grow slowly
- 99% in parotid gland
What groups of people do acinic cell tumours arise in (3)?
- Prevalence highest in middle aged and elderly
- Can occur in children
- More common in females
What is the treatment for Acinic cell tumours?
Local resection with VII nerve preservation and prolonged follow-up
What malignant tumours of salivary glands are there and how common are they (4)?
- Adenoid cystic carcinoma (14% of partoid gland cancers) - most common malignant tumour
- Carcinoma ex pleomorphic adenoma (3-12% of all salivary gland cancers)
- Adenocarcinoma (2.5-4% of all parotid neoplasms)
- Lymphoma
What cells do adenoid cystic carcinomas arise from?
What are the clinical features (3)?
Reserve epithelial cells in the intercalated ducts
- Grow slowly and insidiously
- Propensity for perineural infiltration so presents with palsies and pain
- Can occur in the parotid, submandibular, sublingual and minor salivary glands)
What groups of patients are adenoid cystic carcinomas more common in depending on the location (3)?
- Majority of patients 40-60 yo
- Tumours in submandibular gland generally seen in women
- For minor salivary gland tumours, equal in men and women
What is the treatment of adenoid cystic carcinomas (3)?
- Wide local resection sometimes with sacrifice of VII nerve
- Radiotherapy controversial
- Prolonged follow-up
What is the prognosis of adenoid cystic carcinoma?
Where do they usually metastasise to?
15 year survival 10-26%
Local recurrence 50%
Distant metastasis usually to bone, liver and lung, can be associated with prolonged survival
What are the clinical features of carcinoma ex pleomorphic adenoma (3)?
- Can develop within a pleomorphic adenoma
- Present 10-15 years after a pleomorhic adenoma
- Pain or palsy occurs
What are the clinical features of adenocarcinoma (3)?
- Highly malignant
- Several histological types
- Poor prognosis
What are clinical features of lymphoma (4)?
How is diagnosis made?
- Comprise 40% of non-epithelial tumours of salivary glands
- non-Hodkin’s lymphoma the most common
- Usually arise between 5th-7th decades
- Present as firm rapidly enlarging masses and occasionally lymph node metastases
Diagnosis by open biopsy
Where do malignant tumours of the salivary glands usually metastasise to (5)?
- Skin - melanoma, SCC
- Lung
- Breast
- Kidney
- Upper GI tract
What can a medially deviated tonsil indicate (3)?
- Quinsy
- Malignancy of parotid
- Aneurysm of carotid
What is the pathophysiology of trismus?
Medial pterygoid or trigeminal nerve is affected so can’t open mouth
What are the ddx of a neck lump (10)?
- Skin - sebaceous cysts (anywhere), dermoids (usually midline)
- Subcutaneous - lipomas
- Congenital - thyroglossal cysts (midline), branchial cysts
- Lymph nodes - infected, inflammatory, neoplastic: benign or malignant (primary or secondary)
- Nerves - neuromas
- Blood vessels - haemangiomas, prominent normal vessels
- Paragangliomas - (carotid body tumours/glomus vagale)
- Salivary glands (parotid, submandibular) - infection, inflammation, neoplasia: benign or malignant (primary or secondary), autoimmune disease, stones
- Thyroid
single - cyst, adenoma, carcinoma
multiple/ diffuse - physiological, multinodular goitre, hashimotos - Bone and cartilage - normal anatomy e.g. transverse process of C1, hyoid
What is globus?
Sensation of something sticking in throat, feeling of lump, present even when not swallowing.
(distinct from true dysphagia where food actually sticks)
It is a symptom
What pathologies must you exclude when presented with globus (4)?
- Cancer
- Masses
- Infection
- Reflux
Often no specific cause is found, just sensitivity/hyperawareness
What are some red flags in a patient with globus that could indicate cancer (4)?
- Older smoker
- Dysphagia
- Progressive
- Otalgia
What investigations would you do for someone with globus (4)?
- Examine mouth
- Examine oropharynx
- Examine neck
- ENT flexiscope
What is the management of globus wen no identified cause is found (3)?
- avoid irritants like caffeine, smoking, throat clearing, dry swallowing as this makes underlying sensitivity worse
- ice cold sparkling water sips
- treat laryngopharyngeal reflux (aka silent reflux): this is thought to be a common cause of globus / mucus feeling in throat, but diagnostic criteria and management are poorly defined