Clinical examination of the breast including axillary lymph nodes
If the lump is mobile, not attached to underlying structure, firm in consistence, smooth surface: It’s likely to be fibroadenoma, especially in young patient.
If non-mobile lump, hard in consistency, attached to the underlying structure, irregular surface: It’s likely to be carcinoma.
If there are lumps int he axilla it means carcinoma because that is a sign of metastasis.
If there is no palpable masses the investigation of choice is stereotactic biopsy.
SECOND ASSESSMENT:
If woman is <35 years : Perform USS only
If woman is 35 years or above: Do mammography first and then USS
THIRD ASSESSMENT:
Cytology
In either case, you have done USS which will differentiate whether the lump is cystic or solid. If cystic, perform FNAC. Further management depends upon the type of fluid aspirated:
If aspirate is a clear fluid: Just aspirate and reassure the patient.
If blood stained: send the aspirate to lab for cytology.
If clear fluid but residual mass, perform core biopsy.