Anatomy, Physiology, and Post-Surgical Considerations
Surface anatomy that drives fit
Know the landmarks: clavicle, sternum, inframammary fold, anterior axillary line, latissimus dorsi edge, and the axillary tail. Breast tissue overlies the pectoralis major, with the pectoralis minor and axillary lymph nodes deeper and lateral. Surgical changes to any of these alter how a prosthesis sits and where seams and straps should fall.
Surgical variables
Modified radical mastectomy removes breast tissue and axillary nodes; simple mastectomy spares nodes; lumpectomy preserves contour but may leave a defect; reconstruction (implant, flap, or both) changes projection, firmness, and sensation. Radiation causes skin fragility, fibrosis, and shrinkage over time, so fit must be revisited. Sentinel node biopsy carries lower lymphedema risk than full axillary dissection but not zero.
Physiology of the chest wall
Post-surgical tissue is less tolerant of pressure. Sensation may be reduced or hypersensitive; scar tissue does not stretch like skin. Weight change, aging, and posture shift alter chest wall shape, which is why refitting intervals matter. Lymphedema risk means avoiding constricting bands, tight straps, and prolonged pressure on the affected arm.
Traps to expect
- Assuming a prosthesis that fit at six weeks still fits at one year.
- Fitting an underwire or rigid cup over a radiation-damaged chest wall.
- Treating a reconstructed side as symmetric with the contralateral side.
- Overlooking trunk asymmetry or scoliosis that changes strap length.
Worked rule of thumb
Match the product to the tissue: soft, lightweight, or partial prostheses for fragile or irradiated chest walls; fuller-weight silicone for balance when tissue tolerates it. Reassess at every visit and after any weight change of roughly 10 pounds or more.