One of the most common warning signs of cancer is the development of a lump or swelling, which may occur anywhere in the body—breast, neck, abdomen, groin, or under the skin. These may be painless initially but should never be ignored.
Thyroid cancer
Breast cancer
Soft tissue sarcomas
Lymphoma
If the lump grows in size, feels hard or immobile, or is accompanied by skin changes or pain, a thorough evaluation is required. Imaging (like ultrasound or MRI) and a biopsy can confirm the nature of the lump, and if malignant, surgical excision may be necessary.