How can you distinguish between a benign and malignant breast mass?

Clinical. evaluation and imaging studies(mammogram, ultrasound, MRI) help assess whether a mass needs biopsy for definitive diagnosis. Sometimes certain imaging features are specific for a benign cause(for example hamartoma, calcified fibroadenoma, or oil cyst). Other times, imaging features can estimate the probability of malignancy and help indicate what follow-up is needed.
Guessing. Guessing about whether a breast mass is malignant or benign is kind of like playing Russian Roulette. That is why a medical evaluation is warranted for any breast mass.

Related Questions

What color are the tissue samples from a malignant breast mass?

Breast cancer. Is not about the color. Is about the pathologic finding by the pathologist. A rare but aggresive type of breast cancer is "inflamatory" breast cancer: skin looks very red, and is aggressive. See your doctor for exam. Read more...
It is not. possible to reliably tell the difference between benign and malignant tissue by the color of the specimen. Most needle core biopsy specimens are whitish in color, and possibly blood-tinged, no matter what they turn out to be. Read more...

Last february I did needle aspiration for left breast mass & was fibrocyctic changes. Now I'm pregnant of 31 weeks & worried to converte to malignant?

No! Do you have a familyhx of breast/ovarian cancer? I see you had ovarian cyst/breastmasses, is there a famhx? Age related you are not at risk and fibrocystic changes do not mean cancer. Cut back your caffeine and consider breastfeeding (which protects you from breastcancer), do a monthly breastexam and have our doctor keep an eye on the lump (which may increase in size due to pregnancy hormones). Read more...

Would a benign breast mass be fixed in the tissue? I can move the tissue around it but not the mass itself. Waiting for biopsy results. Scared.

Biopsy will tell. Now that a biopsy has been taken, there is no need for speculation; your biopsy result should be available witin 1-2 days. Malignant lesions usually infiltrate the surrounding tissue and thus are difficult to move around. . Read more...
Yes, a benign mass such as focal fibrosis can be relatively fixed. A fixed mass does not automatically mean it is mailgnant. Read more...