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Cancers Originate from Somatic Mutations in a Single Cell

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...

Cancers Originate from Somatic Mutations in a Single Cell

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...

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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...

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Related Experiment Video

Updated: Jun 17, 2026

Saline Lavage for Sampling of the Canine Nasal Immune Microenvironment

Saline Lavage for Sampling of the Canine Nasal Immune Microenvironment

Published on: December 27, 2024

Multiple distinct malignancies in dogs: 53 cases.

Robert B Rebhun¹, Douglas H Thamm

¹Animal Cancer Center and Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 300 West Drake Road, Fort Collins, Colorado 80523, USA.

Journal of the American Animal Hospital Association

|January 5, 2010

Summary

This summary is machine-generated.

Approximately 3% of dogs presented for cancer treatment had multiple distinct tumors. Dogs with mast cell tumors, malignant melanoma, or thyroid carcinoma were more prone to multiple diagnoses, highlighting the need for comprehensive cancer evaluations.

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Last Updated: Jun 17, 2026

Saline Lavage for Sampling of the Canine Nasal Immune Microenvironment

Saline Lavage for Sampling of the Canine Nasal Immune Microenvironment

Published on: December 27, 2024

Area of Science:

Veterinary Medicine
Canine Oncology
Neoplasia

Background:

Multiple distinct neoplasms in individual dogs are clinically recognized but lack recent detailed reporting.
Canine cancer cases present unique diagnostic challenges due to potential co-existing malignancies.

Purpose of the Study:

To describe the incidence and characteristics of canine oncology cases diagnosed with multiple distinct primary tumors.
To identify specific tumor types associated with a higher likelihood of multiple diagnoses.

Main Methods:

Prospective collection of canine oncology cases diagnosed with multiple, confirmed, distinct malignancies.
Analysis of approximately 1722 dogs presented to a veterinary medical center's oncology service.

Main Results:

Approximately 3% of dogs were diagnosed with multiple distinct primary tumors.
Mast cell tumor, malignant melanoma, and thyroid carcinoma were significantly overrepresented in dogs with multiple tumor types.
No significant breed or sex predisposition was observed.

Conclusions:

Thorough, whole-body evaluation is crucial for dogs diagnosed with mast cell tumor, malignant melanoma, and thyroid carcinoma.
Complete staging is strongly recommended for all dogs with thyroid tumors, as 33% had additional distinct tumors.