Lung Point Sign in Ultrasound Diagnostics of Pneumothorax: Imitations and Variants

Area of Science:

• Medical imaging
• Emergency medicine
• Critical care

Background:

• Pulmonary ultrasound is crucial for diagnosing pneumothorax in emergency and intensive care.
• The lung point sign is a generally accepted pathognomonic indicator.
• Recent literature highlights conditions that can mimic the lung point sign and variations of the true sign.

Purpose of the Study:

• To review and present ultrasound findings that mimic the lung point sign.
• To document variants of the true lung point sign.

Main Methods:

• Literature review and database collection of ultrasound findings.
• Documentation of findings with images and video records.

Main Results:

• Four imitations of the lung point sign were identified: physiological, pseudo, bleb, and pleurofascial point signs.
• Two variants of the true lung point sign were documented: double lung point and hydro point signs.

Conclusions:

• Awareness of lung point sign imitations and variants enhances pneumothorax diagnosis reliability.
• Understanding these variations can decrease the risk of unwarranted interventions.