Related Experiment Video
Updated: May 7, 2026
02:37
Robot-Assisted Transcanal Endoscopic Ear Surgery for Congenital Cholesteatoma
Published on: December 15, 2023
Anal canal duplication in childhood
1Second Department of Surgery, Kansai Medical University, 10-15 Fumizono, Moriguchi, Osaka 570, Japan.
Pediatric Surgery International
|September 24, 2013
Summary
Anal canal duplication is a rare congenital anomaly. Surgical removal via a perineal approach resulted in successful outcomes and preserved anal function in pediatric cases.
Area of Science:
- Pediatric Surgery
- Gastrointestinal Malformations
- Congenital Abnormalities
Background:
- Anal canal duplication is an extremely rare congenital abnormality.
- This condition presents unique diagnostic and surgical challenges in pediatric patients.
- Understanding its pathology is crucial for effective management.
Purpose of the Study:
- To report two pediatric cases of anal canal duplication.
- To describe the clinical presentation, surgical approach, and histological findings.
- To propose the term "anal canal duplication" based on collected cases and literature review.
Main Methods:
- Surgical excision of the duplication through a perineal approach.
- Detailed histological examination of the resected tissue.
- Comprehensive literature review of similar reported cases.
Main Results:
- Two pediatric patients underwent successful complete removal of anal canal duplication.
- Histology confirmed a squamous lining, smooth muscle, and mucus-secreting epithelium.
- Postoperative recovery was uneventful with satisfactory anal function in both cases.
Conclusions:
- Anal canal duplication can be effectively treated with complete surgical excision.
- The proposed term "anal canal duplication" accurately reflects the condition's features.
- This study contributes to the understanding and management of this rare anomaly.
More Related Videos
10:30The C. elegans Excretory Canal as a Model for Intracellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis in a Single Cell: labeling by GFP-fusions, RNAi Interaction Screen and Imaging
Published on: October 3, 2017
06:59Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
Published on: February 29, 2020
Related Concept Videos
02:05Chromosome Duplication
The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
02:37Gene Duplication and Divergence
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
02:25Centrosome Duplication
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
01:27Diverticular Disease of the Colon
Diverticular disease involves the formation of diverticula—small sac-like outpouchings of the colonic wall—and their complications. It most commonly affects the sigmoid colon due to higher intraluminal pressure and structural vulnerability. It results from structural weakness and increased pressure in the colon, producing pseudodiverticula that may remain silent or progress to inflammation and serious complications.Structure of DiverticulaIn diverticulosis, these outpouchings are...
02:04Polytene Chromosomes
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...
01:11Pyloric Obstruction
Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...