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CAP ApprovedBreast

___ pTis:Ductal carcinoma in situ

___ pTis:Lobular carcinoma in situ

___ pTis:Paget disease without invasive carcinoma

pT1: Tumor 2.0 cm or less in greatest dimension

___ pT1mic: Microinvasion 0.1 cm or less in greatest dimension

___ pT1a:Tumor more than 0.1 cm but not more than 0.5 cm in greatest dimension

___ pT1b:Tumor more than 0.5 cm but not more than 1.0 cm in greatest dimension

___ pT1c:Tumor more than 1.0 cm but not more than 2.0 cm in greatest dimension

___ pT2:Tumor more than 2.0 cm but not more than 5.0 cm in greatest dimension

___ pT3:Tumor more than 5.0 cm in greatest dimension

pT4: Tumor of any size with direct extension to chest wall or skin, but only as described below.#

___ pT4a:Extension to chest wall, not including pectoralis muscle

___ pT4b:Edema (including peau d’orange) or ulceration of the skin of the breast or satellite skin nodules confined to the same breast

___ pT4c:Both T4a and T4b

___ pT4d:Inflammatory carcinoma

# Clinical information may be required to designate a tumor as pT4. Dermal invasion alone (without ulceration, satellite nodules, or inflammatory breast cancer) does not alter T category. Such cases are classified as T1, T2, or T3, depending on tumor size.

Regional Lymph Nodes (pN) (choose a category based on data supplied with specimen; immunocytochemistry and molecular studies are not required)

___ pNX:Cannot be assessed (previously removed or not removed for pathologic study)

___ pN0:No regional lymph node metastasis histologically (ie, none greater than 0.2 mm), no examination for isolated tumor cells (ITCs)

___ pN0(i-):No regional lymph node metastasis histologically, negative morphologic (any morphologic technique, including hematoxylin-eosin and immunohistochemistry) findings for ITCs

___ pN0(i+):No regional lymph node metastasis histologically, positive morphologic (any morphologic technique, including hematoxylin-eosin and immunohistochemistry) findings for ITCs, no ITC cluster greater than 0.2 mm

___ pN0(mol-):No regional lymph node metastasis histologically, negative nonmorphologic (molecular) findings for ITCs

___ pN0(mol+):No regional lymph node metastasis histologically, positive nonmorphologic (molecular) findings for ITCs

___ pN1:Metastasis in 1 to 3 axillary lymph nodes, and/or internal mammary nodes with microscopic disease detected by sentinel lymph node dissection but not clinically apparent

___ pN1mi:Micrometastasis (greater than 0.2 mm, none greater than 2.0 mm)

___ pN1a:Metastasis in 1 to 3 axillary lymph nodes (at least 1 tumor deposit greater than 2.0 mm)

___ pN1b:Metastasis in internal mammary lymph nodes with microscopic disease detected by sentinel lymph node dissection but not clinically apparent

* Data elements with asterisks are not required for accreditation purposes for the Commission on Cancer. These elements may be clinically important, but are not yet validated or regularly used in patient management. Alternatively, the necessary data may not be available to the pathologist at the time of pathologic assessment of this specimen.

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