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Related Concept Videos

Histology of the Small Intestine01:27

Histology of the Small Intestine

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The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
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Renewal of Intestinal Stem Cells01:23

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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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Related Experiment Video

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Myeloid Sarcoma in the Small Intestine.

Masaya Iwamuro1, Tomohiro Kamio1, Shoichiro Hirata1

  • 1Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Japan.

Internal Medicine (Tokyo, Japan)
|December 18, 2024
PubMed
Summary

Myeloid sarcoma, a rare tumor, can cause intestinal obstruction and may be linked to acute myeloid leukemia (AML). Early diagnosis via biopsy is crucial for effective treatment and improved patient outcomes.

Keywords:
acute myeloid leukemiadouble-balloon enteroscopymyeloid sarcomasmall intestine

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Area of Science:

  • Oncology
  • Gastroenterology
  • Hematology

Background:

  • Myeloid sarcoma is a rare extramedullary tumor composed of immature myeloid cells.
  • It is frequently associated with acute myeloid leukemia (AML).
  • Small bowel tumors can present with obstructive symptoms.

Purpose of the Study:

  • To report a case of small intestinal myeloid sarcoma presenting as intestinal obstruction.
  • To highlight diagnostic challenges and the utility of double-balloon enteroscopy.
  • To emphasize the importance of early diagnosis and treatment of myeloid sarcoma.

Main Methods:

  • Case report of an 81-year-old male with intestinal obstruction.
  • Diagnostic procedures included double-balloon enteroscopy and biopsy.
  • Histological analysis confirmed myeloid sarcoma.

Main Results:

  • The patient presented with small bowel obstruction due to myeloid sarcoma.
  • Diagnosis was confirmed via biopsy obtained through double-balloon enteroscopy.
  • The patient later developed AML and responded to chemotherapy.

Conclusions:

  • Myeloid sarcoma should be considered in the differential diagnosis of small bowel tumors, especially those causing obstruction.
  • Histological analysis is critical for diagnosis, even in patients without prior hematologic malignancy.
  • Early detection and treatment of myeloid sarcoma are vital for improving patient prognosis.