Dr. Shilpy Dolas clarifies the difference between Fibroadenoma vs Cyst Key Differences Composition: oFibroadenoma: A solid, firm, rubbery tumor. oCyst: A smooth, round or oval sac filled with fluid. Common Age Group: oFibroadenoma: Most frequent in younger women and teens aged 15 to 35. oCyst: Most common in women in their 30s, 40s, and approaching menopause · How They Feel: Fibroadenoma: Feels smooth, firm, and slides easily under the skin (often called a "breast mouse"). Cyst: Can feel soft or hard (if deep in the tissue) and may become tender or painful right before a menstrual period. · Diagnosis: Confirmed using imaging like an ultrasound scan or mammogram, which easily tells liquid apart from solid tissue. · Treatment: Fibroadenoma: Often left alone and monitored, or removed if it grows large or causes discomfort. Cyst: May disappear on its own or can be treated instantly by draining the fluid with a fine needle.