Case 1B Female, 8 years, nodule back. Same case as Case 1A, S-100 stainShow diagnosis & comments
Spitz tumour of uncertain malignant potential (STUMP)
The S-100 immune stain shows the regular architecture of this lesion. Nodular outgrowth is situated at the border between subcutis and dermis; within the dermis, the pattern of spread is infiltrative and similar throughout.