checking file exists before adding hyperlink

I have the following code:

Sub attachyperlinks()

Dim MyCell As Object
Dim Link As String


For Each MyCell In Selection
    If MyCell <> "" Then
        ActiveSheet.Hyperlinks.Add Anchor:=MyCell, Address:="C:\Users\folderA\folderB\log\" & MyCell.Value & ".pdf", ScreenTip:="Click to Open"
    End If

Next MyCell

MsgBox ("Hyperlinks attached successfully.")

End Sub

Which attaches a hyperlink to the selected cells using cell contents are filename.

What i now need to add is code to make it check if the file exists first before adding the hyperlink. If the file is not there then the hyperlink should not be added ie leave cell contents as is.

Can someone please advise me?