The cystic nature of a breast lump can be confirmed by ultrasound examination, aspiration (removal of contents with needle), or mammogram. Ultrasound can also show if the cyst contains solid nodules, a sign that the lesion may be pre-cancerous or cancerous.
A breast lump's fluid-filled nature can be confirmed through ultrasound imaging, fine-needle biopsy, or X-ray mammography. Additionally, ultrasound can detect the presence of solid growths within the cyst, suggesting that the lesion might be precancerous or cancerous in nature.