What does non-mass enhancement mean on MRI?

What does non-mass enhancement mean on MRI?

Non-mass enhancement at breast MRI is defined in the BI-RADS lexicon as an area of enhancement that does not meet criteria for a mass, such as by having nonconvex borders or intervening fat or fibroglandular tissue between the enhancing components.

What does non-mass enhancement?

Non-mass enhancement (NME) is defined as an enhancing abnormality that is not associated with the three-dimension volume of a mass, shape and outlining, and they are separate from the Background Parenchymal Enhancement (BPE).

What does non-mass mean?

Nonmass findings have been described in the literature with various terms with varying descriptors, but all studies define a nonmass finding as a sonographic finding that does not conform to a mass shape (ie, nonconvex borders) (Table 1) (2,4,8–12).

What does enhancement mean on an MRI?

‘Enhancement’ refers to a process by which lesions revealed on a breast MRI image increases in contrast at a specific rate over a given short-time interval, which indicates increased vascularity to the area.

What causes non mass enhancement?

Non-mass enhancement is most commonly due to fibrocystic changes, hormonal stimulation, inflammatory changes, or malignant lesions. The most common malignant causes of non-mass enhancement are DCIS, diffuse invasive breast cancers, especially lobular cancer and sometimes ductal cancers [4].

What causes MRI enhancements?

Typical causes of non-mass-like enhancement include mastopathic changes, fibrocystic changes due to hormonal stimulation, inflammatory changes for benign lesions or ductal carcinoma in situ (DCIS), invasive lobular carcinoma and some cases of oestrogen receptor-negative invasive ductal carcinoma.

Is non-mass enhancement cancerous?

What does an MRI show that a mammogram doesn t?

MRI, used with mammography and breast ultrasound, can be a useful diagnostic tool. Recent research has found that MRI can locate some small breast lesions sometimes missed by mammography. It can also help detect breast cancer in women with breast implants and in younger women who tend to have dense breast tissue.

What does foci of enhancement mean?

“Focus/foci” is used to describe enhancement without specific features, whereas “focal area” describes NMLE that is confined in small scope. Focus/foci usually refers to the isolated stippled enhancement during the early arterial phase with a diameter less than 5 mm.

What is an enhancing mass?

Abstract. Rim enhancement is defined as enhancement that is more pronounced at the periphery of a mass. It can have varying appearances, ranging from a thin pattern to one that is thicker. This internal enhancement characteristic is an established characteristic of malignant lesions.

What causes non-mass enhancement?

What is a non mass like enhancement?

Non-mass-like enhancement (NMLE) refers to lesions with abnormal enhancement larger than focus but without space-occupying effect characteristics. Notably, it is often mentioned as “non-mass-like enhancement” rather than “non-mass lesion”.

What is Focal non mass enhancement?

Focal refers to non-mass enhancement in less than 25% of a quadrant of the breast. Ductal involvement is enhancement in a ductal distribution, and is cancer in 60% of cases. Linear enhancement is similar to ductal enhancement, but does not have a ductal orientation.

What is enhancement on MRI?

‘Enhancement‘ refers to a process by which lesions revealed on a breast MRI image increases in contrast at a specific rate over a given short-time interval, which indicates increased vascularity to the area.