melanocytic slide club case 201 dr richard a. carr
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Melanocytic Slide ClubCase 201
Dr Richard A. Carr
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M11. Lesion on forearm
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Summary of EQA Participant Responses (N=28)
• Spitz Naevus 10• DPN 2• Blue Naevus 1• Atypical / Borderline 10
– Note: includes most of the above responders
• Melanoma 12– Spitzoid 1– SSMM: 2– LMM 1– Desmoplastic 1– Malignant Blue 1– Unclassifiable 4
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Results (N=28)• Clark level:
– IV 1– V 12
• Breslow– Median (Range): 4.2 (3.5 to 6.3)
• Growth Phase– VGP 12– RGP 0
• Regression: Y/N 1/11• Mitotic Rate:
– Absent: 1– Low: 11– High: 0
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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