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Related Concept Videos

Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Rous Sarcoma Virus (RSV) and Cancer01:03

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Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
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Osteoclasts in Bone Remodeling01:31

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Tumor Progression02:07

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
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Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

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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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Related Experiment Video

Updated: Feb 23, 2026

Intratibial Osteosarcoma Cell Injection to Generate Orthotopic Osteosarcoma and Lung Metastasis Mouse Models
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Multicentric osteosarcoma

M Laus

    Italian Journal of Orthopaedics and Traumatology
    |August 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Multicentric osteosarcoma, a rare bone cancer with multiple lesions, often appears before lung metastasis. This aggressive cancer has historically proven fatal with a short survival time.

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    Area of Science:

    • Orthopedic Oncology
    • Skeletal Pathology

    Background:

    • Osteosarcoma is a primary bone malignancy.
    • Multicentric osteosarcoma presents with multiple simultaneous bone lesions.

    Observation:

    • This rare variant is characterized by radiographically sclerosing lesions.
    • Lesions precede the development of pulmonary metastases.

    Findings:

    • The described case highlights the pathological and clinical features of multicentric osteosarcoma.
    • Literature review indicates a uniformly fatal prognosis for this condition.

    Implications:

    • Early diagnosis and understanding of multicentric osteosarcoma are crucial.
    • Therapeutic management strategies for this rare osteosarcoma subtype require further investigation.