How common is a breast lump in triple-negative breast cancer?

Triple-negative breast cancer does not have the hormone receptors or HER2 features used to define several other breast cancer types. A lump can be the first noticeable change, found on examination, or detected during imaging. It may feel fixed, mobile, firm, or tender, but touch cannot determine whether a lump is cancer or establish its subtype.

Benign changes such as cysts, fibroadenoma, inflammation, or hormonal breast tissue can also produce a lump. Assessment commonly combines a clinical examination with diagnostic imaging. If the finding remains concerning, a biopsy provides cells or tissue for laboratory analysis, including tests that classify the cancer and help guide treatment.

Book a clinical assessment for any new lump, a lump that persists, or a change that is growing or becoming different. Before the appointment, record when you noticed it and any related discharge, skin change, nipple change, or armpit swelling. Mention pregnancy, breastfeeding, previous breast procedures, family history, and current medicines. Try not to keep checking the area forcefully, as pressure can cause discomfort.

Contact a clinician promptly when a lump is accompanied by skin dimpling, a newly pulled-in nipple, bloody discharge, persistent one-sided swelling, redness, or an enlarged armpit node. A hot, painful breast with fever may need prompt treatment for infection. Seek urgent help for severe illness, faintness, or breathing difficulty rather than waiting for a routine appointment.

Ask what the examination and imaging show, whether a biopsy is needed, and which laboratory tests would identify tumour receptors. You can also ask when results are expected, what symptoms should trigger earlier contact, and who will explain treatment choices if a diagnosis is confirmed.