Bone Mineral Density Quantitative Trait Locus 18, also known as x-linked osteoporosis with fractures, is related to bone mineral density quantitative trait locus 8 and bone mineral density quantitative trait locus 15. An important gene associated with Bone Mineral Density Quantitative Trait Locus 18 is PLS3 (Plastin 3). Affiliated tissues include bone and breast.