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Infantile neuroaxonal dystrophy. A portion of one of the unmyelinated axons (asterisk) in this conjuctival perivascular nerve is distended by an accumulation of tubulo-membranous structures, degenerate organelles, and amorphous electron-dense materials. With these, distinctive axonal “spheroids” become more condensed and display characteristic clefts. (Courtesy of Dr. Gary Mireau.)
