4mm its in the question
Breast nodules are lumps in breast tissue. They may sometimes be felt in one or both of the breast. Both men and women at any age may have breast nodules and it is important to know the difference between a healthy and unhealthy breast tissue.
3 to 4mm
5mm
216 mm3
That would be a "hard pea-sized lump that doesn't show up on ultrasound".
12 cm2
1.5 cm
23.54 nano meters
A solid breast nodule may appear on a mammogram due to its density, which can create an abnormal shadow or mass that is detectable on X-ray images. However, if the nodule is small or has a specific composition that doesn't reflect sound waves effectively, it may not be visualized on ultrasound. Additionally, the orientation and depth of the nodule can affect its visibility on ultrasound, making it challenging to detect in some cases. It's important for healthcare providers to use both imaging modalities for a comprehensive evaluation.
A 4mm diamond measures 4mm in at least one measurement.
7 mm is about a quarter inch and 3 mm about an eighth of an inch.