What should you know about mastectomy with lymph node dissection?

Lymph nodes are small immune-system structures that drain fluid from the breast and nearby tissues. During a dissection, the surgeon removes a group of nodes from the armpit rather than only the first draining node. A pathologist examines the tissue and reports features that help the team plan treatment. Node involvement does not by itself describe the whole outlook, and clear nodes do not remove the need for the rest of the treatment plan. The operation may be combined with breast reconstruction, and the extent of surgery depends on examination, imaging, biopsy results and previous treatment.

Before surgery, ask whether sentinel node biopsy or another approach could provide the information needed, and why a full dissection is recommended in your case. Learn how to manage drains, protect the incision and begin gentle shoulder movement. Avoid heavy lifting until the team clears it, while continuing the exercises provided to prevent stiffness. Watch for arm heaviness, tightness, reduced movement or swelling, and mention these early because lymphoedema therapy may help manage symptoms. Keep pathology and follow-up appointments so results can guide any further treatment.

Call the surgical team for fever, increasing redness, pus, wound opening, persistent bleeding, a rapidly enlarging swelling or pain that is worsening. Report new or increasing swelling, heaviness, tight skin or reduced movement in the arm, hand, breast or chest. Emergency care is needed for sudden breathlessness, chest pain, fainting or severe allergic symptoms.

Why is dissection recommended instead of sentinel node biopsy alone? Which nodes will be removed? When will pathology results be available, and how could they change treatment? What exercises are safe for my shoulder? How will you monitor and treat arm swelling? Can reconstruction happen at the same operation?