MCQ – 100854

Which of the following is not included in stage 4B of breast cancer?

Correct Answer » D Explanation

Staging of Breast Cancer (Based on AJCC TNM Classification):

• Stage 4 (IV): Defined by distant metastasis, regardless of tumor size or nodal involvement

• Stage 4A: Lung, liver, bone metastases

• Stage 4B: Cutaneous manifestations like ulceration, peau d’orange, and satellite skin nodules, but without distant organ metastases (some sources variably refer to these findings under T4b in TNM rather than stage 4B per AJCC; however, for the context of skin involvement, this answer structure remains clinically relevant)

• T4b features (locally advanced breast cancer with skin involvement):

• Ulceration of skin over the breast

• Edema (including peau d’orange)

• Satellite skin nodules

• T4d (Inflammatory breast cancer) is a distinct and more aggressive subtype, characterized by:

• Diffuse erythema and edema involving >1/3 of the breast skin

• Often without an underlying discrete mass

• Associated with dermal lymphatic invasion

• Classified as T4d, regardless of tumor size or lymph node status

• Cellulitis/erythema over more than one-third of the breast is characteristic of inflammatory breast cancer, which is classified as T4d, a separate and more severe entity.

• It is not part of T4b or Stage 4B, which includes ulceration, peau d’orange, and satellite nodules without diffuse inflammation.

Reason to Rule Out Other Options:

A. Ulceration:

• Included under T4b (skin involvement without inflammatory carcinoma)

• Represents direct extension to skin – part of locally advanced breast cancer

B. Peau d’orange:

• Edematous skin changes due to dermal lymphatic obstruction

• Characteristic of T4b, included in advanced local disease

C. Satellite nodule:

• Small nodules on skin near the primary tumor

• Indicates cutaneous spread, part of T4b classification