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Procedure

Local excision Resection Metastasectomy Other Not specified

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Tumor Site

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Tumor Size (cm)

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Tumor Focality

Unifocal Multifocal

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Histologic Type

Gastrointestinal stromal tumor, spindle cell type Gastrointestinal stromal tumor, epithelioid type Gastrointestinal stromal tumor, mixed Gastrointestinal stromal tumor, other

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Mitotic Rate

Specify: /5mm^2

Note: The required total count of mitoses is per 5 mm2 on the glass slide section. With the use of older model microscopes, 50 HPF is equivalent to 5 mm2. Most modern microscopes with wider 40X lenses/fields require approximately 20 to 25 HPF to encompass 5 mm2. If necessary, please measure field of view to accurately determine actual number of fields required to be counted on individual microscopes to encompass 5 mm2.

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+ Necrosis

Not identified Present Cannot be determined

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Histologic Grade

G1: Low grade; mitotic rate ≤5/5 mm2 G2: High grade; mitotic rate >5/5 mm2 GX: Grade cannot be assessed

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Risk Assessment A word about GIST risk assessment

A word about GIST risk assessment

×

None Very low risk Low risk Moderate risk High risk Overtly malignant/metastatic Cannot be determined

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Margins

Cannot be assessed Uninvolved by GIST Involved by GIST

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Regional Lymph Nodes

Check here if any lymph nodes submitted?

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Pathologic Staging (pTNM)

TNM Descriptors (select all that apply)

Not applicable m r y

pT

pTX: Primary tumor cannot be assessed pT0: No evidence of primary tumor pT1: Tumor 2 cm or less pT2: Tumor more than 2 cm but not more than 5 cm pT3: Tumor more than 5 cm but not more than 10 cm pT4: Tumor more than 10 cm in greatest dimension

pN

pN0: No regional lymph node metastasis or unknown lymph node status pN1: Regional lymph node metastasis

pM

pMx: Not applicable pM1: Distant metastasis

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Ancillary Studies

Immunohistochemical Studies

KIT (CD117), Positive KIT (CD117), Negative DOG1 (ANO1), Positive DOG1 (ANO1), Negative SDHB, Positive SDHB, Negative SDHA, Positive SDHA, Negative Other Pending Not performed

+ Molecular Genetic Studies

Submitted for analysis; results pending Performed, see separate report Not performed

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Treatment Effect

No known presurgical therapy Not identified Present Cannot be determined