B767 Captain reports rejected takeoff just after 80 knot call for possible engine failure and momentary loss of directional control.

Narrative

We departed 6 hours late. There was a snow ice event with deicing procedures in effect. When we deiced; the precipitation was being reported as light freezing drizzle on ATIS. We noted on taxi out that precipitation had stopped. Our block to takeoff roll was around 10 minutes. First Officer was Pilot Flying. We were set for flaps 15 degrees maximum power takeoff. The braking conditions were reported as poor. We took the runway and set power to 60% N1 -- all checked good. Set takeoff thrust -- all looked good. I called 80 KTS and shortly afterward the aircraft pulled hard left. I called abort and took the aircraft. Went to reverse thrust and RTO kicked on -- we started skidding sideways. I stowed reversers and turned off RTO; straightened out aircraft; then manually reapplied brakes and idle reverse. Exited the runway. Tower noted flames from left engine during abort. We did a block turn back to the ramp and entered abort in the logbook. Mechanics noted no metal in tailpipe but 2 latches on pylon were unlatched.