American Board of Internal Medicine (ABIM) Certification Practice Exam

Fine needle aspiration is generally reserved for which type of breast lesions?

1. Ultrasound-confirmed cystic lesions

2. Palpable solid masses

3. Skin lesions

4. Benign growths

The correct answer is: Ultrasound-confirmed cystic lesions

Fine needle aspiration (FNA) is a minimally invasive procedure primarily used to sample cells from abnormal growths or lesions. It is particularly valuable for targeting specific lesions that exhibit certain characteristics, with ultrasound guidance playing a key role. When it comes to breast lesions, ultrasound-confirmed cystic lesions are typically recognized as suitable candidates for FNA due to their fluid-filled nature. The procedure allows for the aspiration of the fluid within these cysts to confirm their benign nature or to relieve symptoms caused by larger cysts. Ultrasound guidance ensures accurate targeting of the cyst, minimizing the risk of unnecessary complications and enhancing diagnostic yield. While palpable solid masses, skin lesions, and benign growths may also be explored with FNA, the most specific and common indication for its use is often linked to cystic lesions that are visually confirmed through imaging. Cystic lesions frequently present in a way that is conducive to a safe and effective aspiration, making them the primary target for this diagnostic tool.