Question: 20200055




#1:   Solid Tumor Rules (2018, 2021)
#2:   Multiple primaries
#3:   Melanoma


Source 1:   COVID-19 Abstraction Guidelines
Notes:   Updated August 2020
Source 2:  


Solid Tumor Rules (2018)/Multiple primaries--Melanoma:  Should a case with treatment delayed due to COVID-19 be abstracted as one or two primaries? It is uncertain if the invasive tumor would be a new tumor, or deeper extension/disease progression from the original tumor.  See Discussion.


11/18/2019 Left 1st Digit/Thumb Biopsy: Atypical Melanocytic Proliferation consistent with Early Acral Lentiginous Melanoma in situ. Margins Positive. (Not a reportable diagnosis for 2019.)

12/5/2019 Left 1st Digit Shave Biopsies: Malignant Melanoma in situ. Margins Positive.

1/15/2020 Started Aldara (treatment plan: use for ~3 months then Mohs/excision, but due to COVID could not get resection until 7/2020).

7/29/2020 Left Thumb Excision: Residual Melanoma in situ. Margins Positive. Treatment Plan: re-excision.

8/6/2020 Left Thumb Re-Excision: Atypical Lentiginous Melanocytic Proliferation at the 12-2 margin may represent the advancing edge of melanoma in situ. (8/19/2020 Plan to treat the 12-2 margin as positive with in situ; plan for re-excision).

8/20/2020 Left Thumb Re-Excision & Left Nail Plate Excision: Malignant Acral Lentiginous Melanoma with extensive melanoma in situ. Breslow 1.3mm. Margins Positive. Nail plate & bed epithelium with hemorrhage and a mild increase in melanocyte density likely represent melanoma in situ.

9/4/2020 Left thumb partial amputation & Left axillary Sentinel Lymph Node Excision: Residual Malignant Melanoma in situ. 0/3 sentinel nodes positive.


Abstract a single primary using the Solid Tumor Rules for melanoma. Report this melanoma as invasive (/3) as documented in the information from 8/20/2020. The treatment delay does not influence the number of primaries to be reported. Registries in SEER regions: Report the COVID-related information as directed in the COVID-19 Abstraction Guidelines,  


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