rare (adj) — sense 2

The anterior and posterior skin of the upper chest and shoulders demonstrated irregularly jagged borders with areas of soot and charring focally. The soft and bony tissues underlying the borders were markedly damaged by presumed explosive injuries. There were rare abrasions and contusions of the chest and upper extremities. The lower extremities demonstrated rare abrasions and contusions as well as severe lacerations of the anteromedial knees with underlying fractures of the distal aspects of the femora (Image 4).