HI Thank for asking to HCM I appreciate your concern here are the answers of your questions 1) while comparing with the normal breast, the normal breast looks more pendulous than the malignant one, on palpation one can feel the hard lump inside the breast, untreated case more prone to fungal infection, loss of weight. 2) If you find the lump look for mobility if this is freely moves then no need to worry, still mammogram, CT scan, biopsy are must. 3) Wearing the bra does not cause the cancer. 4) NO if this benign lesion then this can not turns into malignancy. 5) The breast malignancy is not always inheritant. 5) Being a female you could get the breast cancer this is not true, but of course the incidence increased. 6) If you are physically active then the chances of this reduces greatly. 7) The balance and healthy diet makes the difference. 8) the chances of breast cancer in smokers is high than the non smokers, and the same is true for alcohol, hope this information helps you have nice day.