Length of the femoral tunnel in anatomic ACL reconstruction: comparison of three techniques.

PURPOSE: The aim of this paper was to determine whether the change in the position of the patient's leg as well as the use of flexible reamers may help in obtaining a longer femoral tunnel with minimal risk of perforating the posterior cortex. METHODS: One hundred and twenty-five patients who had undergone anatomic ACL reconstruction between 2010 and 2013 were included in this prospective cohort study. The first group was composed of patients whose femoral tunnel had been drilled with rigid reamers, while the leg being operated on was positioned on an arthroscopic leg holder (82 patients). In the second group of patients, the femoral tunnel was also drilled with rigid reamers, but the leg was positioned on the table (25 patients), while the third group was composed of patients whose femoral tunnel was drilled with flexible reamers, and the leg was positioned on a leg holder (18 patients). The length of the femoral tunnel was measured intraoperationally, while the site of femoral insertion and the position of the tunnel were read from native radiographic images. RESULTS: When the femoral tunnel was drilled on the medial aspect of the lateral condyle, the centre of the tunnel was located at 31.4 % from the most proximal point of the femoral condyle and 34.7 % from the Blumensaat line. The length of the tunnel drilled with rigid reamers on the operating table (36.1 mm) was statistically significantly greater (p < 0.05) than the length of the tunnel drilled with the same reamers, but with the leg positioned on the leg holder (32.5 mm). The length of the tunnel drilled with flexible reamers with the leg positioned on the leg holder (42.5 mm) was highly statistically significantly greater than the length of the tunnel drilled with rigid reamers (p < 0.01), and it was statistically significantly greater than the length of the tunnel drilled with rigid reamers with the leg placed on the operating table (p < 0.05). CONCLUSION: The drilling of the femoral tunnel during anatomic ACL reconstruction with the use of flexible reamers provides a longer femoral tunnel than when it is drilled with rigid reamers, without any danger of perforation of the posterior cortex. LEVEL OF EVIDENCE: III.

[Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL)--three case reports from Serbia].

INTRODUCTION: Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a hereditary microangiopathy leading to recurrent strokes and vascular dementia in young and middle-aged patients. The diagnosis of CADASIL is based on typical clinical presentation and characteristic magnetic resonance imaging (MRI) changes, and has to be confirmed by biopsy of the sural nerve, muscle and skin, as well as by genetic analysis. Mutations within the Notch3 gene were identified as the underlying genetic defect in CADASIL. CASE OUTLINE: The clinical manifestations of the first presented patient with migraine from the age of thirteen, stroke without vascular risk factors and stepwise progression of vascular dementia comprising the typical clinical picture of CADASIL, were confirmed after seven years with pathological verification. The second presented case did not satisfy the clinical criteria for CADASIL. His stroke was considered to be related with vascular risk factors--diabetes mellitus and hypertension. The aetiological diagnosis was established only when his brother without vascular risk factors presented with similar clinical manifestations. CONCLUSION: Until the development of the new neuroimaging techniques like MRI, pathologic and genetic analysis, CADASIL was considered as a rare disorder. However, the increasing number of CADASIL families has been identified throughout the world showing that this entity is usually underdiagnosed. This article presents three patients from two Serbian families with clinical suspicion of CADASIL verified by pathologic examination.