The role of ultrasonography and MRI in patients with non-traumatic nerve fascicle torsion of the upper extremity

MRI bullseye sign: An indicator of peripheral nerve constriction in parsonage‐turner syndrome

“…Most reports of HGCs have not included pre‐operative imaging, and those in which imaging identified such a finding involved ultrasound . A recent literature search by the authors revealed only 3 reports documenting identification of HGCs with MRI . The following case series, with MRI and operative correlation, illustrates the role of MRI in identifying such HGCs.…”

“…While their etiology still remains a mystery, HGCs have been reported as surgical findings during nerve exploration for the past half century . Most reports of HGCs have not included pre‐operative imaging, and those in which imaging identified such a finding involved ultrasound . A recent literature search by the authors revealed only 3 reports documenting identification of HGCs with MRI .…”

Ultrasonographic identification of nerve pathology in neuralgic amyotrophy: Enlargement, constriction, fascicular entwinement, and torsion

“…Moreover, another peculiar phenomenon, the surgical finding of nerve torsion, has occasionally been described in patients with neuralgic amyotrophy‐like clinical presentation . In a recent study, 11 surgically confirmed cases of nerve torsion also showed the typical feature of an hourglass‐like appearance of the nerve on both the ultrasound and MRI . Altogether, there is evidence that phenomena such as nerve constriction and torsion are associated with neuralgic amyotrophy, yet there is no unifying analysis of ultrasonographic findings in neuralgic amyotrophy.…”

Prospective clinical and sonographic observation of the patient with hourglass-like focal radial nerve constriction

“…В 1966 г. опубликовано наблюдение с описанием слу-чайной находки фокальной констрикции перифери-ческого нерва (ФКПН) по типу «песочных часов» у пациента, направленного на хирургическое лечение по поводу острой нейропатии лучевого нерва [1]. В по-следующем случаи ФКПН были описаны и другими хирургами [2][3][4][5][6][7][8], а также представлены результаты сопоставления операционных находок с результатами изменения нерва по данным ультразвукового исследо-вания (УЗИ) и магнитно-резонансной томографии на том же уровне [9][10][11][12][13], при этом не проводилось системной оценки обнаруженных изменений. Вопрос о структурных и функциональных нарушениях пери-ферического нерва при острых мононейропатиях до сих пор остается открытым.…”