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Related Concept Videos

Appendicitis-I: Introduction01:22

Appendicitis-I: Introduction

The appendix, a small, narrow, blind tube extending from the inferior part of the cecum, is widely regarded as a vestigial organ, having lost much of its original function through evolution. Despite its diminished role, the appendix can become inflamed, a condition known as appendicitis.
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
Herniated Intervertebral Disc l: Introduction01:29

Herniated Intervertebral Disc l: Introduction

Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...
Appendicitis01:19

Appendicitis

Appendicitis is an acute inflammatory condition of the vermiform appendix, most commonly caused by obstruction of its lumen. The appendix is a narrow, blind-ended pouch that extends from the cecum, making it particularly prone to obstruction. Causes include fecaliths, lymphoid hyperplasia (often after viral infections), parasites, tumors, or foreign bodies. This obstruction initiates a cascade of pathological changes.Luminal Obstruction and Early InflammationAfter obstruction, normal mucosal...
Abdominal Regions and Quadrants01:19

Abdominal Regions and Quadrants

To promote clear communication, for instance, about the location of a patient's abdominal pain or a suspicious mass, anatomists and clinicians typically use imaginary lines to categorize the abdominopelvic cavity into either four quadrants or nine regions to identify organs in the cavity.
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four quadrants...
Intestinal Obstruction II: Pathophysiology01:07

Intestinal Obstruction II: Pathophysiology

Intestinal obstruction triggers a series of physiological responses, starting with gas and fluid accumulation in the bowel segment proximal to the obstruction, leading to distension. This distended intestine compresses the diaphragm, hindering lung expansion and potentially leading to reduced respiratory effort, atelectasis, and pneumonia.To overcome the blockage, the gut intensifies contractions, causing colicky abdominal pain, nausea, and vomiting, which reduces fluid and food intake and...
Spinal Nerves: Plexus II01:21

Spinal Nerves: Plexus II

The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...

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Related Experiment Video

Updated: Jun 26, 2026

Spinal Hernia Repair and Cauda Equina Repositioning After Lumbar Decompression under Three-Dimensional Microscopy: A Case Report and Literature Review
04:33

Spinal Hernia Repair and Cauda Equina Repositioning After Lumbar Decompression under Three-Dimensional Microscopy: A Case Report and Literature Review

Published on: November 8, 2024

Sciatica caused by pseudomyxoma peritonei.

Hung-Lin Lin1, Jung-Tsung Chen, Yu-Fang Liu

  • 1Department of Neurosurgery, China Medical University Hospital, Taichung, Taiwan, R.O.C. linhunglin0405@yahoo.com.tw

Journal of the Chinese Medical Association : JCMA
|February 3, 2009
PubMed
Summary
This summary is machine-generated.

Intra-abdominal masses rarely cause sciatica through compression. A pelvic mass compressing the lumbosacral trunk improved sciatica after surgery, highlighting this rare cause.

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Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity

Published on: December 21, 2012

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Last Updated: Jun 26, 2026

Spinal Hernia Repair and Cauda Equina Repositioning After Lumbar Decompression under Three-Dimensional Microscopy: A Case Report and Literature Review
04:33

Spinal Hernia Repair and Cauda Equina Repositioning After Lumbar Decompression under Three-Dimensional Microscopy: A Case Report and Literature Review

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Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity
07:20

Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity

Published on: December 21, 2012

Area of Science:

  • Neurology
  • Oncology
  • Gynaecology

Background:

  • Sciatica often results from various causes, with intra-abdominal masses typically affecting the lumbosacral plexus via invasion or metastasis.
  • Lumbosacral plexopathy due to direct tumor invasion is more common than compression by intra-abdominal tumors.

Observation:

  • A 67-year-old woman presented with a 3-month history of progressive neurogenic claudication, low back pain, and left L5 radiculopathy with foot drop.
  • She also experienced nocturia, abdominal distension, and voiding dysfunction.
  • Imaging revealed a large pelvic mass severely compressing the left lumbosacral trunk without direct invasion.

Findings:

  • The patient was diagnosed with bilateral ovarian borderline mucinous cystic tumors with pseudomyxoma peritonei (PMP).
  • Sciatica symptoms significantly improved following surgical debulking of the abdominal mass.
  • Preoperative and intraoperative assessments confirmed no direct invasion of the lumbosacral plexus.

Implications:

  • This case underscores that neural compression by intra-abdominal masses, including PMP, is a rare but important consideration in the differential diagnosis of sciatica.
  • Prompt surgical intervention for mass compression can lead to dramatic symptom resolution.
  • Highlights the need for comprehensive diagnostic evaluation in patients presenting with sciatica and abdominal symptoms.