Malignant masses tend to be ___ within tissues.

Malignant masses tend to be ___ within tissues.

• A. Fixed.
• B. Move freely.
• C. Expands rapidly.
• D. Be compressible.

Answer: (A)

Fixation of a breast lump reflects invasion and attachment of malignant cells to surrounding tissues such as fascia, muscle, or skin. When a tumor grows into adjacent structures, it loses mobility and may pull on ligaments or skin, creating tethering, retraction, or dimpling. That loss of mobility is a classic clinical clue suggesting malignancy, because benign masses are typically mobile and slide under the palpating finger. The other ideas don’t fit as well. A lump that moves freely is more typical of benign lesions that aren’t invading surrounding tissue. Rapid expansion can happen with various conditions and isn’t reliable for distinguishing malignant from benign. A compressible mass suggests a fluid-filled or soft lesion, which is less characteristic of solid malignant tumors that tend to be firm and non-compressible due to their cellular and fibrous tissue content.

Fixation of a breast lump reflects invasion and attachment of malignant cells to surrounding tissues such as fascia, muscle, or skin. When a tumor grows into adjacent structures, it loses mobility and may pull on ligaments or skin, creating tethering, retraction, or dimpling. That loss of mobility is a classic clinical clue suggesting malignancy, because benign masses are typically mobile and slide under the palpating finger.

The other ideas don’t fit as well. A lump that moves freely is more typical of benign lesions that aren’t invading surrounding tissue. Rapid expansion can happen with various conditions and isn’t reliable for distinguishing malignant from benign. A compressible mass suggests a fluid-filled or soft lesion, which is less characteristic of solid malignant tumors that tend to be firm and non-compressible due to their cellular and fibrous tissue content.