SEER Inquiry System - Question 20000546 Details

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Produced: 04/13/2026 8:32 PM

Question 20000546

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Inquiry Details

References:

SEER EOD-88, 3rd Ed, 104

Question:

EOD-Extension--Mycosis Fungoides: Explain the difference between extension codes 25 [% of body surface not stated, no tumors] and 30 [skin involvement, NOS; extent not stated, no tumors. Localized, NOS]?

Discussion:

Answer:

For cases diagnosed 1998-2003:

For mycosis fungoides: Use code 25 when skin involvement is present but only a general location/site is mentioned (i.e., face, legs, torso, arms).

Use code 30 when there is skin involvement but there is no mention of location/site.

Cancer Site Category:

Lymphoma

Data Item Category:

N/A

Other Category:

N/A

Year:

2000