Breast: Fibroadenoma

Basics

• Definition: A Benign Breast Tumor of Mixed Fibrous & Glandular Tissue
• The Most Common Benign Breast Tumor
• Most Common in Young Women (Age 15-35)

Presentation

• Well-Defined Mobile Mass
• Smooth Edges
• Rubbery Consistency
• May Cause Pain
• Vary with Hormonal Changes:
  • May Vary with Cycle
  • Increase in Size with Pregnancy
  • Often Involute After Menopause

Diagnosis

• Initial Evaluation: Imaging (Mammogram/US)
• Diagnosis: Core Needle Biopsy (CNB)
  • May Be Difficult to Distinguish from Phyllodes Tumor (Both May Show Cellular Fibroepithelial Lesions)
• *Consider Clinical Diagnosis Alone in Children/Adolescents without Imaging/CNB if Clearly Benign
• *See Breast: Breast Mass Evaluation

Treatment

• General Treatment: Observation & Repeat Imaging in 3-6 Months
• Indications for Surgical Excision:
  • Symptomatic (Pain Most Common)
  • Interval Growth
  • Large Size (> 3 cm)
  • Unable to Exclude Malignancy
  • Patient Preference/Anxiety