If a lump on examination shows mobility, what is the likelihood of it being benign versus malignant?

When a lump shows mobility during an examination, it is often an indication that it is more likely to be benign. Benign masses typically have well-defined borders and are less likely to be fixed to surrounding tissues, allowing for more movement upon palpation. This characteristic is commonly associated with cysts, lipomas, and other non-cancerous growths.

In contrast, malignant tumors often invade nearby tissues, which can result in a fixed or immovable lump. The mobility of a lump acts as a clinical sign that can guide practitioners to consider benign conditions more favorably.

The other options do not align as well with this understanding. While factors like age can influence the risk of malignancy and may warrant further investigation, they do not directly pertain to the lump's mobility. Immediate removal might be necessary in certain situations, but it is not a general rule based solely on the mobility of the lump. The preference towards benignity in mobile lumps reflects a common clinical insight that is critical for accurate diagnosis and patient management.