SEER Inquiry System - Question 20071070 Details

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Question 20071070

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References:

2007 SEER Manual, 126. 4.c, 4.d

Question:

CS Tumor Size--Melanoma: How is this field coded when a smaller invasive and a larger in situ melanoma are reported as a single primary? See Discussion.

Discussion:

Patient has a 1.2 cm lesion right upper arm with a diagnosis of melanoma in situ. A second lesion on right wrist, 0.5 cm mole, has a diagnosis malignant melanoma, Breslow's 0.78, Clark's level III.

According to the 2007 MP/H rules, this is a single primary. Because the larger lesion is completely in situ, do you ignore it altogether and go with the smaller, invasive lesion? SEER Program Manual 2007, page 127, rule 4.l, states that when two lesions are reported as a single primary, code the size of the larger lesion, which in this case would be the in situ.

Answer:

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.Code CS Tumor Size as 005 (0.5 cm). Code CS Tumor Size based on the invasive lesion.

Use the data items "Multiplicity Counter" and "Type of Multiple Tumors Reported as One Primary" to document that there are two tumors present, in situ and invasive.

Cancer Site Category:

Melanoma

Data Item Category:

N/A

Other Category:

N/A

Year:

2007