Minimally invasive posterior percutaneous transarticular C1-C2 screws: how I do it.

BACKGROUND: Transarticular C1-C2 screw fixation, first described by Magerl, is a widely accepted used technique for C1-C2 instability with a good biomechanical stability and fusion rate. METHOD: We present a 69-year-old woman, who was diagnosed with a C2 Odontoid fracture type III and primarily treated with conservative treatment and collar. During first 2 weeks of follow-up, the patient developed cervical pain associated with C1-C2 instability. A minimally invasive posterior C1-C2 transarticular screw instrumentation with a percutaneus approach was performed. RESULTS AND CONCLUSION: Minimally invasive approach with tubular transmuscular approach for C1-C2 transarticular screws instrumentation is safe and effective for C1-C2 instability.

An exceptional presentation of pituicytoma apoplexy: A case report.

Pituicytomas are a rare form of indolent neoplasms, which typically present with visual disturbance and hypopituitarism. Complete resection by a trans-sphenoidal approach is the optimal treatment. Only 80 cases have been described thus far in the current literature and the present case is the first to describe the development of pituitary apoplexy in the context of a pituicytoma. A 77-year-old man presented with fatigue and clinical signs of hypogonadism and a sellar lesion was diagnosed at cerebral magnetic resonance imaging (MRI). A watch-and-wait management was initially decided and 1 year after the initial diagnosis, he presented with a thunderclap headache with images suggestive of pituitary apoplexy. A pituitary adenoma was suspected and an endoscopic resection was decided upon the development of a visual deficit. Pathological analysis established the correct diagnosis of a pituicytoma. Pituicytomas are characterised by dense vascularisation, thus ischaemic and haemorrhagic events may be common. When confronted with a hypervascularised pituitary lesion demonstrating strong contrast enhancement and no abnormal hormonal secretion, one must maintain a high index of suspicion for a pituicytoma. A wide range of differential diagnoses should thus be considered in the context of pituitary apoplexy.

Comparison of Complications in Patients Receiving Different Types of Intracranial Pressure Monitoring: A Retrospective Study in a Single Center in Switzerland.

OBJECTIVE: Intracranial pressure (ICP) monitoring has become "state of the art" in the management protocol for unconscious or sedated patients with intracranial pathologies; however, all current monitoring systems have significant drawbacks. We analyzed the complications of these monitoring devices as well as the risk factors for those complications. METHODS: We reviewed a total of 288 patients with ICP monitoring, i.e., 173 external ventricular drainage (EVD) and/or 123 intraparenchymatous catheters (IPCs). Placement of the IPC or EVD was performed by a standardized protocol according to fixed anatomical landmarks. Infections were diagnosed from positive cerebrospinal fluid cultures, positive devices cultures, and/or fever; hemorrhages were diagnosed by postprocedure computed tomography. RESULTS: Sixteen patients (9.2%) with an EVD and 1 patient (0.8%) with an IPC system experienced an infection (P < 0.01). Factors associated with a greater risk for infections include subarachnoid hemorrhage (10 patients, 9.4%), intraventricular hemorrhage (7 patients, 8.6%), and concomitant catheters (6 patients, 3,5%). Mean monitoring time was 3.9 days (range 1-17 days), with the greatest incidence of infections between day 5 and 11. Intracerebral hemorrhage was seen in 2 patients with EVD and in 1 patient with IPC (P < 0.01). None of these patients needed surgical evacuation of the blood clot. CONCLUSIONS: EVD is an indispensable device in neurosurgery. Unfortunately, it has a significantly high complication rate, mostly in relation to infections. Therefore, the indication of the device used to monitor ICP must be evaluated carefully. The antimicrobial-impregnated external catheter and silver-coated catheters might decrease the problem of infection.

Bilateral ptosis: Lesion in the oculomotor nuclei or supranuclear lesion?

BACKGROUND: Bilateral ptosis is a very interesting clinical challenge for doctors because of the multiple possible localizations of a lesion which can lead to this neurological sign. OBJECTIVES: Through this case report, we aim to determine the difference between an apraxia of lid opening (ALO) with difficulty in initiating the act of lid elevation, in spite of adequate understanding, motor control and cranial nerve pathways, and a bilateral ptosis with a lesion in the oculomotor nucleus or blepharospasm. METHODS: The case report of a 50-year-old patient presenting bilateral ptosis and multiple ischemic lesions in the brainstem and bilateral frontal lobe lesions after the emergency removal of a large frontal tumor. RESULTS: Our patient had an ALO according to the neurological follow-up and showed the ability, after a few weeks, of initiating the act of opening her eyes with her hand. The ophthalmic evaluation confirmed that in her case the ALO was associated with a nuclear lesion of the oculomotor nerve secondary to a midbrain lesion. CONCLUSION: Our case report confirms multiple differential diagnoses in bilateral ptosis and the importance of clinical examination in spite of good neurological imaging.