Triangulated DNA matches and Pile-up Areas #dna

Lee Jaffe

I would appreciate help to determine whether a cluster of triangulated DNA matches is significant or whether it is negated because it is in a pile-up region.  
In the example from MyHeritage, I've identified four people who match me on the same segment – Chromosome #2   88,474,256 - 105,231,018
All of the individuals have fairly strong matches to me, enough that I already considered them higher priority on their own.  The possibility of identifying four matches with a suggestion that we  share a common ancestor might be a useful clue in solving some of my brick walls.

However, I recently attended a DNA workshop where the instructor mentioned that matches in pile-up areas were not useful.  According to the chart I copied, there is a common pile-up area on Chr #2 starting 85,304.243 and ending 99,558,013  As you can see there is some overlap with the triangulated segment I am investigating.  BUT, the triangulated segment isn't completely within the pile-up area where the examples shown during the workshop were entirely within the pile-up area.  Therefore, I wonder ...

Is the triangulated segment significant or not? 

I've found a number of good guides about pile-up areas and also those discussing triangulation but I haven't managed to find anything which relates one to the other.  I'm hoping members of the list can answer this or point me to a source which provides the answer.  I quit Facebook a year ago, so I don't have access to the relevant groups there.  I've tried to join JewishGen's DNA Testing mailing list but haven't yet managed to navigate that resource.  

Thanks in advance for your help,

Lee David Jaffe
Surnames / Towns:  Jaffe / Suchowola, Poland ; Stein (Sztejnsapir) / Bialystok and Rajgrod ; Roterozen / Rajgrod ; Joroff (Jaroff, Zarov) / Chernigov, Ukraine ; Schwartz (Schwarzstein) / Ternivka, Ukraine ;  Weinblatt / Brooklyn, Perth Amboy, NJ ; Koshkin / Snovsk, Ukraine ; Rappoport / ? ; Braun / Wizajny, Suwalki,  Ludwinowski / Wizajny, Suwalki


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