A young male with a lung mass

A young male with a lung mass A 28-year-old man presented with a history of cough and left anterior chest pain of 3-months duration.He was a lifelong non-smoker and had no known comorbid conditions.A chest X-ray was done (Fig. 1a) and he was managed symptomatically.He had minimal relief from symptoms and he developed clear watery expectoration.A repeat chest X-ray (Fig. 1b) was done when he reported to our centre.He was diagnosed as pulmonary hydatid disease with Fig. 1a showing an intact cyst and Fig. 1b demonstrating a classical water lily sign.Echinococcus species cause hydatid disease and are endemic in South America, Africa, and Asia.Clinically, the patient may be asymptomatic with incidental detection on chest X-ray or may present with non-specific symptoms like chest pain, cough, and haemoptysis.Large cysts (>20 cm) or cyst rupture may cause more severe symptoms.