Need help understanding biopsy report for my 8 year old son – ATYPICAL INTRADERMAL MELANOCYTIC NEOPLASM

Our son started developing a growth along the left eye socket below his eyebrow.  At first we thought it was a pimple but then it got bigger and looked more like a growth, like a skin tag.  It was pinkish-red in color, not dark like a mole.  His doctor said it looked like a growth where the veins start growing outside the skin rather than inside and not to worry but recommended having it removed.  We took him to the dermatologist and they confirmed that it needed to be removed.

When we got the biopsy results, the PA asked my wife a bunch of questions but never explained the results to her but assured her that it wasn't cancer.  They said to her that he won't need chemo or anything but that they were going to refer him to a plastic surgeon to have the rest of it removed.  Based on the terminology of the report, I'm now wondering how can they be certain and how are they going to know how much to remove.  They made it sound as if the surgeon would know and that because they will have to go down to the fat layer and with it being on his face, the plastic surgeon would be a better option to minimize scaring.  We haven't spoken to the surgeon yet and we aren't sure if they are the right one to even speak to.  I'm going to try calling the dermatologist back and see what I can figure out.

I don't want to overreact but this is new to us and we are not sure what we are even reading.  I tried doing some research last night on Spitz tumors but I'm not even sure based on the wording of the report that this was the finding.

CLINICAL DATA:   SHAVE.
                                 ERYTHEMATOUS, GLISTENING, BLEEDING PAPULE.
                                 RULE OUT: PG VS. OTHER.

DIAGNOSIS:

LEFT GLABELLA

ATYPICAL INTRADERMAL MELANOCYTIC NEOPLASM WITH SPINDLED AND EPITHELIOID CELL        FEATURES, SURFACE PORTION; PLEASE SEE COMMENT.

GROSS DESCRIPTION:  2 x 3 mm fragment

MICROSCOPIC DESCRIPTION:
Sections show an intradermal melanocytic proliferation.  The melanocytic proliferation is composed of epithelioid and spindled cells with abundant eosinophilic to amphophilic cytoplasm and vesicular nuclei.  The nuclei display irregular contours and contain prominent nucleoli.  Rare mitotic figures are observed.  Within the epidermis, there are rare dyskeratotic cells.  The proliferation involves both lateral edges and is broadly transected along the deep microscopic edge.  Multiple level are examined.

COMMENT:
The microscopic finding are those of the surface portion of an atypical compound melanocytic neoplasm with spindled and epithelioid cell features.  The morphologic findings favor the surface portion of an atypical Spitz tumor.  However, the lesion involves both lateral edges and is broadly transected along the deep section edge.  In view of these findings, as well as the presence of rare dermal mitotic figures, re-excision is recommended.