Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma Virus (RSV) and Cancer

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.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...

Reaction Mechanisms

Reaction Mechanisms

Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:

Determining Order of Reaction

Determining Order of Reaction

Rate laws describe the relationship between the rate of a chemical reaction and the concentration of its reactants. In a rate law, the rate constant k and the reaction orders are determined experimentally by observing how the rate of reaction changes as the concentrations of the reactants are changed. A common experimental approach to the determination of rate laws is the method of initial rates. This method involves measuring reaction rates for multiple experimental trials carried out using...

Reaction Yield

Reaction Yield

The theoretical yield of a reaction is the amount of product estimated to form based on the stoichiometry of the balanced chemical equation. The theoretical yield assumes the complete conversion of the limiting reactant into the desired product. The amount of product that is obtained by performing the reaction is called the actual yield, and it may be less than or (very rarely) equal to the theoretical yield.

Reaction Rate

Reaction Rate

The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...

Reaction Quotient

Reaction Quotient

The status of a reversible reaction is conveniently assessed by evaluating its reaction quotient (Q). For a reversible reaction described by m A + n B ⇌ x C + y D, the reaction quotient is derived directly from the stoichiometry of the balanced equation as

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Systematic Review of Paraspinal Muscle Changes in Lumbar Spondylolisthesis: MRI and CT Insights.

Orthopaedic surgery·2026

Same author

Radiologic and Lipid Metabolism Imaging Features Associated with FABP2 Expression in Clear Cell Renal Cell Carcinoma: An Interpretable Supervised Machine Learning Radiogenomic Study.

Archivos espanoles de urologia·2026

Same author

Mediastinal adipose tissue as an active player in cardiovascular disease: a multimodality imaging narrative review.

Quantitative imaging in medicine and surgery·2026

Same author

iLips<sup>®</sup>: A 5-Years Experience with a Highly Reproducible Approach for Dynamic Lip Filler.

Aesthetic plastic surgery·2026

Same author

Soft tissue changes in Dementia: A comprehensive systematic review.

Aging brain·2026

Same author

Direct Brow Lift: A Prospective Study on Aesthetic, Long-Term Efficacy, Scar-Related Outcomes and Patient Satisfaction.

Aesthetic plastic surgery·2026

Search research articles

Related Experiment Video

Updated: Feb 12, 2026

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

Foreign Body Reaction Mimicking Sarcoma.

Francesco Segreto¹, Giovanni Francesco Marangi¹, Pietro Francesco Delle Femmine¹

¹Department of Plastic, Reconstructive and Aesthetic Surgery, "Campus Bio-Medico di Roma" University, Rome, Italy; and Unit of Diagnostic Imaging, "Campus Bio-Medico di Roma" University, Rome, Italy.

Plastic and Reconstructive Surgery. Global Open

|April 11, 2018

Summary

Foreign body reactions can mimic soft tissue sarcoma, posing diagnostic challenges. Surgeons should consider inflammatory pseudo-tumors, or gossypibomas, as a differential diagnosis in imaging-suspicious masses.

More Related Videos

The In ovo CAM-assay as a Xenograft Model for Sarcoma

The In ovo CAM-assay as a Xenograft Model for Sarcoma

Published on: July 17, 2013

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

Published on: April 7, 2017

Related Experiment Videos

Last Updated: Feb 12, 2026

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

The In ovo CAM-assay as a Xenograft Model for Sarcoma

The In ovo CAM-assay as a Xenograft Model for Sarcoma

Published on: July 17, 2013

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

Induction of Mesenchymal-Epithelial Transitions in Sarcoma Cells

Published on: April 7, 2017

Area of Science:

Oncology
Pathology
Radiology

Background:

Foreign body reactions can present as soft tissue masses.
Distinguishing these reactions from malignancy can be challenging based on imaging alone.

Observation:

A 42-year-old patient presented with a rapidly growing subcutaneous mass in the lower leg.
Initial ultrasonography and MRI suggested soft tissue sarcoma.

Findings:

Histopathology revealed the mass to be an inflammatory pseudo-tumor, also known as gossypiboma.
This highlights the potential for foreign body reactions to mimic sarcoma.

Implications:

Imaging findings suggestive of sarcoma may sometimes represent benign inflammatory processes.
Awareness of gossypibomas is crucial for accurate diagnosis and appropriate surgical management.
Radiologists and surgeons should consider foreign body reactions in the differential diagnosis of soft tissue masses.