Incidence of Pinhole Type Durotomy and Subsequent Cerebrospinal Fluid Leakage Following Simple Laminectomy

STUDY DESIGN: Cross sectional study. PURPOSE: The purpose of this study was to determine the incidence and the associated risk factors of pinhole type of durotomy and cerebrospinal fluid (CSF) leakage following a simple laminectomy for spinal stenosis. OVERVIEW OF LITERATURE: The incidence of spinal stenosis is expected to rise with increasing life expectancy. Moreover, lumbar spinal stenosis is the most common indication for spinal injury in the geriatric population. It is therefore important to identify and prevent the risks associated with laminectomy, the most widely used surgical procedure for spinal stenosis. The serious complication of incidental dural tear or durotomy and subsequent CSF leakage has not been studied in the region of Southeast Asia. METHODS: In this cross sectional study, we included 138 adult patients (age>18 years), who underwent a simple laminectomy for lumbar stenosis between 2011 and 2012. CSF leakage was the main outcome variable. Patients' wounds were examined for CSF leakage up to 1 week postoperatively. RESULTS: The incidence of pinhole type durotomy and subsequent CSF leakage in our region was 8.7%. Univariate analysis showed that hypertension, diabetes and smoking were significantly associated with durotomy and increased CSF leakage by 16.72, 44.25, and 33.71 times, respectively. Multivariate analysis showed that only smoking and diabetes significantly increased the chances of leakage. CONCLUSIONS: Glycemic control and cessation of smoking prior to a simple laminectomy procedure reduced the incidence of a dural tear. Larger clinical studies on this lethal complication are required.

Primary intracranial malignant melanoma

Primary intracranial melanoma is an extremely rare lesion of the brain. A 28 years old lady, without any co-morbid conditions, presented with headache and left side facial numbness. MRI of brain showed a mass lesion in left middle cranial fossa extending into posterior fossa, with signals characteristics of melanoma. Histology and immunohistochemistry confirmed the diagnosis after surgical excision of that lesion. Patient remained symptom-free till the last follow-up that was four years postoperatively