“It may start as low-pitched ‘croaking’ and progress to high-pitched ‘crowing’ on more vigorous respiration.
“It is usually heard on inspiration due to partial obstruction of the airway (usually extrathoracic – that is, in the trachea, larynx or pharynx).”
But it’s important to note stridor isn’t always a symptom of lung cancer.
Patient.info continues: “Stridor is common in younger children with smaller airways.
“In children, acute stridor often accompanies upper respiratory tract infection.
“In children, chronic stridor usually occurs with congenital conditions.”
Stridor in adults is much less common.
It adds: “Chronic stridor in adults often indicates serious underlying pathology.”
Not all symptom of lung cancer are found in the chest.
These are less common signs but can occur in other areas of the body:
- Changes in the appearance of your fingers, such as becoming more curved or their ends becoming larger (this is known as finger clubbing)
- Difficulty swallowing (dysphagia) or pain when swallowing
- A hoarse voice
- Swelling of your face or neck
- Persistent chest or shoulder pain