SEER Inquiry System - Question 20180033 Details

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Produced: 07/25/2025 9:38 AM

Question 20180033

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Inquiry Details

References:

WHO Class Female Genital Tumors, 122, 138. 4th edition

Question:

Reportability--Corpus uteri: Is smooth muscle tumor with uncertain malignant potential (STUMP) reportable? See Discussion.

Discussion:

Spindled cell lesion of smooth muscle origin (desmin and SMA are positive, CD34, S100, pancytokeratin, Pax8, MDM2 and CDK4 are negative). Many of the cells have hyperchromatic, bizarre-shaped nuclei. Mitotic activity is inconspicuous. There are no areas of necrosis. The overall findings in this biopsy is best classified as a "STUMP"; however, a leiomyosarcoma cannot be excluded.

Answer:

STUMP (smooth muscle tumor of uncertain malignant potential) is not reportable. According to the WHO classification of uterine corpus tumors, the behavior code for STUMP is /1.

Cancer Site Category:

Corpus uteri

Data Item Category:

N/A

Other Category:

Reportability

Year:

2018