Recent studies have suggested that species-specific pit properties such as pit membrane thickness, pit membrane porosity, torus-to-aperture diameter ratio and pit chamber depth influence xylem vulnerability to cavitation. Despite the indisputable importance of using mean pit characteristics, considerable variability in pit structure within a single species or even within a single pit field shou...

AIM Primary sacral lymphoma is rare. It usually presents in elderly males as low back ache and radiculopathy. CASE REPORT We hereby report a case of primary sacral lymphoma in a 53-year-old male who presented with low back pain. Imaging showed a sacral lesion which on histopathology proved to be a non-Hodgkin's lymphoma of B cell lineage. MATERIAL AND METHODS The case is pre...

BACKGROUND U-shaped sacral fractures are highly unstable, can cause significant neurological deficits, lead to progressive deformity and chronic pain if not treated appropriately. OBJECTIVE To report a case of a U-shaped sacral fracture treated with lumbopelvic fixation and decompression of sacral roots in a 23-year-old man. METHOD Decompression of the sacral roots combined with internal re...

* Corresponding author Seyed Taher Esfahani, MD Department of Pediatric Nephrology Children Medical Center Dr. Gharib St., Azadi Ave. Tehran, IRAN Tel: +9821-66929234 Fax: +9821-66930024 E-mail: esfahanisedtaher@ yahoo.com Introduction: The association of sacral anomalies with fecal incontinence and lower urinary tract dysfunction is known. The sacral ratio is proposed as a tool for evaluation ...

Sacral chordomas represent more than 50% of all sacral tumors. These slow-growing, malignant lesions present insidiously and are often large and intimately involved with sacral neurovascular and pelvic structures. En bloc resection is the only well-established predictor of progression-free survival. Optimal surgical management requires a complex multi-disciplinary approach. Here, we describe tw...

One of the main concerns of the mining industry is to determine ultimate pit limits. Final pit is a collection of blocks, which can be removed with maximum profit while following restrictions on the slope of the mine’s walls. The size, location and final shape of an open-pit are very important in designing the location of waste dumps, stockpiles, processing plants, access roads and other surfac...

Pavlovian conditioned stimuli can influence instrumental responding, an effect called Pavlovian-instrumental transfer (PIT). During the last decade, PIT has been subdivided into two types: specific PIT and general PIT, each having its own neural substrates. Specific PIT happens when a conditioned stimulus (CS) associated with a reward enhances an instrumental response directed to the same rewar...

Transverse sacral fractures in young patients occur with high-energy mechanisms. Because of the drawbacks in radiographic and neurologic evaluations of the sacral area in polytrauma patients, misdiagnosis is quite common. In this study, we aimed to report our clinical results in three patients with displaced transverse sacral fractures compromising the sacral canal and concomitant late-diagnose...

Sacral agenesis belongs to spectrum of aplastic vertebral malformations ranging from agenesis of coccyx to lower thoracic vertebrae and the term sacral agenesis has been used synonymously with caudal regression syndrome. Higher the defect, severe is the neurological deficit. Mangeau and Leclaire described a patient with ninth thoracic vertebra as the lowest segment(l). Sacral agenesis is more c...

Fixation to the sacrum and pelvis is a problem in the operative treatment of spinal deformity. Previous testing of pedicle screws address axial pull-out strength, yet how screws are loaded in vivo remains unknown. The goals of this study were to determine the loads experienced by sacral screws when loaded as part of Cotrel-Dubousset (CD) sacral instrumentation and whether different anterior gra...