Related Experiment Video
Updated: Aug 13, 2026
07:18
Isolation and Characterization of Tumor-initiating Cells from Sarcoma Patient-derived Xenografts
Published on: June 13, 2019
Malignant islet cell tumor with rhabdomyosarcomatous differentiation
J Ferreiro1, K Lewin, R M Herron
1Department of Pathology, UCLA Medical Center 90024.
The American Journal of Surgical Pathology
|May 1, 1989
Summary
This study reports a rare pancreatic islet cell tumor with rhabdomyosarcoma-like features. This unique case expands understanding of neuroendocrine tumor differentiation and metastatic potential.
Area of Science:
- Oncology
- Pathology
- Gastroenterology
Background:
- Pancreatic islet cell tumors, also known as neuroendocrine tumors (NETs), are neoplasms arising from endocrine cells of the pancreas.
- Metastatic potential and diverse histological subtypes present diagnostic and therapeutic challenges.
Observation:
- A case of widely metastatic pancreatic islet cell tumor with focal areas exhibiting rhabdomyosarcoma-like morphology is described.
- Immunohistochemistry confirmed desmin expression in these rhabdoid areas.
Findings:
- This represents the first documented instance of an islet cell/carcinoid tumor displaying rhabdomyosarcoma-like differentiation.
- While light microscopy did not reveal cross-striations, electron microscopy identified Z-lines and thick filaments, characteristic of muscle differentiation.
Implications:
- This finding suggests a broader spectrum of differentiation possible in pancreatic neuroendocrine tumors.
- Understanding such rare histological variants is crucial for accurate diagnosis, prognosis, and development of targeted therapies for metastatic pancreatic NETs.
More Related Videos
Related Concept Videos
02:23Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
01:12Type I Diabetes I: Introduction
Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...
01:26Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...