Nonpalpable Breast Masses

Nonpalpable breast masses are lesions that cannot be detected during physical examination but are identified through imaging methods such as mammography, ultrasound, or breast MRI. While these lesions may sometimes be benign, in some cases they may be associated with early-stage breast cancer, microcalcifications, or precancerous changes. Therefore, the evaluation of nonpalpable breast lesions and, when necessary, their removal from the correct area are highly important.

For nonpalpable breast masses to be surgically removed, the location of the lesion must be precisely identified before the procedure. This process is called breast lesion localization or marking. This is because the surgeon may not be able to directly locate a focus that cannot be felt by hand during surgery. With localization, the target tissue can be removed more accurately, unnecessary tissue loss can be reduced, and surgical success can be supported.

The marking methods used for nonpalpable breast masses are determined according to the structure and location of the lesion, imaging findings, the technical capabilities of the center, and the patient’s treatment plan.

Wire-Guided Localization Method for Nonpalpable Breast Masses

Wire-guided localization is one of the methods that has been used for many years in the preoperative localization of nonpalpable breast lesions. In this method, the radiologist places a thin guide wire into the area where the lesion is located under mammography or ultrasound guidance. The tip of the wire indicates the target tissue, and the surgeon follows this wire during surgery to remove the area where the lesion is located.

• The procedure is usually performed under mammography or ultrasound guidance.
• The guide wire is placed into or immediately near the lesion.
• The surgeon follows the wire during surgery and removes the target tissue.

Advantage: It is a widely applicable method that directly guides the surgeon.

Disadvantage: Since part of the wire remains outside the breast, it may cause discomfort for the patient. In addition, the procedure is usually performed on the day of surgery.

Radioactive Marking with the ROLL Method for Nonpalpable Breast Masses

The ROLL method is based on marking nonpalpable breast lesions with a radioactive substance. In this method, a low-dose radioactive substance is injected into the area where the lesion is located. During surgery, the surgeon identifies the marked area with the help of a special detector called a gamma probe and removes the target tissue.

• A low-dose radioactive substance is applied into the lesion.
• The marked area is located with a gamma probe during surgery.
• The target tissue can be removed in a more controlled manner.

Advantage: It helps determine the location of the lesion precisely.

Disadvantage: It requires nuclear medicine infrastructure and technical preparation suitable for this method.

Marking Nonpalpable Breast Masses with Magseed and Radar Reflector

Magseed and radar reflector systems are among the current localization methods used for the preoperative marking of nonpalpable breast masses. In these methods, a small marker is placed inside the lesion. During surgery, the surgeon finds this marker with the help of a special detector and removes the target tissue.

• A small marker that emits a magnetic or radar signal is placed into the lesion.
• The target area is found with a special detector during surgery.
• Since no wire remains outside the body, it may provide an advantage in terms of patient comfort.

Advantage: The marker can be placed before surgery and may be more comfortable for the patient because there is no external wire.

Disadvantage: It may not be available in every center and may require special equipment.

Marking Nonpalpable Breast Masses with Dye

Dye marking allows the target area to become visible during surgery by injecting a special dye into the region where the nonpalpable breast lesion is located. Dyes such as methylene blue may be used for this purpose. The surgeon follows the dyed area and removes the tissue containing the lesion.

• A marking dye is applied to the lesion area.
• The surgeon follows the dyed tissue during surgery.
• In some cases, it may be preferred together with other localization methods.

This method is generally not used alone but may be used as support for wire localization, radioactive marking, or different localization methods.

Removal of Lesions with Vacuum-Assisted Biopsy in Nonpalpable Breast Masses

Vacuum-assisted biopsy is a method that may help with diagnosis and treatment in some small breast lesions that appear benign. In this procedure, tissue samples can be taken from the lesion using a thick needle and vacuum system. In suitable cases, most or all of the lesion may be removed.

• The procedure is performed under imaging guidance.
• A thick needle and vacuum system are used.
• In some benign lesions, it may be considered as an alternative to surgery.

However, surgical removal may be more appropriate for lesions that carry suspicion of cancer , have unclear borders, or require pathological examination. Therefore, the suitability of vacuum-assisted biopsy should be determined according to imaging findings and physician evaluation.

Why Is Precise Marking Important in Nonpalpable Breast Masses?

Nonpalpable breast lesions are foci that cannot be detected by hand and are therefore difficult to locate directly during surgery. These lesions may sometimes be associated with early-stage breast cancer, microcalcifications, or precancerous changes. Therefore, removing the correct area is important for both diagnosis and treatment planning.

• It helps remove the target lesion from the correct location.
• It may reduce unnecessary breast tissue loss.
• It may contribute to reducing the possibility of repeat surgery.
• It supports a more accurate pathological examination.

The method to be used for nonpalpable breast masses is determined according to the imaging characteristics of the lesion, its location in the breast tissue, the suspicion of cancer, and the patient’s overall treatment plan. Therefore, the same marking method may not be preferred for every patient.

Detection of a nonpalpable breast mass does not always mean cancer. However, these types of lesions should be regularly evaluated and clarified with biopsy or surgical removal when necessary.