1. Melanocytic Slide Club Case 201 Dr Richard A. Carr

2. M11. Lesion on forearm

15. Summary of EQA Participant Responses (N=28) Spitz Naevus10 DPN2 Blue Naevus1 Atypical / Borderline10 –Note: includes most of the above responders Melanoma12 –Spitzoid1 –SSMM: 2 –LMM1 –Desmoplastic 1 –Malignant Blue1 –Unclassifiable4

16. Results (N=28) Clark level: –IV1 –V12 Breslow –Median (Range): 4.2 (3.5 to 6.3) Growth Phase –VGP12 –RGP0 Regression: Y/N1/11 Mitotic Rate: –Absent:1 –Low:11 –High:0

17. Atypical Spitz: “Difficult Spitzoid, Lateral Spread” DPN (UMP): “Manage as melanoma but in view of age and sparse mitoses consider DPN” DPN (UMP): “Difficult - possible atypical deep penetrating naevus- I would suggest uncertain malignant potential as I certainly would not wish to exclude melanoma. History important. Sentinel node would be of interest” Melanoma: “Very tricky case in a child. Has there been previous treatment/trauma?” Slide Club: Expert Comments