label: Necklace skeletal muscle fibers
label_lc: necklace skeletal muscle fibers
description: "A histological alteration of muscle fibers that resembles a necklace (necklace fibers). A substantial proportion of fibers (4-20% in PMID:19084976) show internalized nuclei aligned in a basophilic ring (necklace) at 3 micrometers beneath the sarcolemma. Ultrastructurally, such necklaces consist of myofibrils of smaller diameter, in oblique orientation, surrounded by mitochondria, sarcoplasmic reticulum and glycogen granules."