“…Fibromatosis colli is often associated with laborious labor, even if the pathophysiological mechanism remains little known and subject to controversy [11]. Indeed, in the two cases of Tchaou et al [6], if the notion of trauma was noted in the first case, in the second, the absence of obstetric trauma does not allow to establish the mechanism involved in the formation of fibromatosis colli. The etiologies of fibrmatosis colli still debated are related either to an intrauterine fetal malposition, or to traumas of the muscle during a laborious delivery, at the origin of a reduction in blood flow responsible for a degeneration of muscle fibers and a development of fibrosis as in the case that we report; the two mechanisms can be entangled [10,12,13].…”