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Related Concept Videos

The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancers Originate from Somatic Mutations in a Single Cell02:21

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...
Abnormal Proliferation02:23

Abnormal 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...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...

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Related Experiment Video

Updated: May 20, 2026

Teratoma Generation in the Testis Capsule
05:24

Teratoma Generation in the Testis Capsule

Published on: November 7, 2011

Familial germ cell tumor.

Sanju Cyriac1, Rejeev Rajendranath, A Robert Louis

  • 1Department of Medical Oncology, Cancer Institute (WIA), Adyar, Chennai, India.

Indian Journal of Human Genetics
|July 4, 2012
PubMed
Summary
This summary is machine-generated.

This study highlights a rare familial cancer case involving siblings with different sex germ cell malignancies, suggesting a potential genetic link. Further research into familial germ cell tumors is warranted.

Keywords:
Familialgeneticsgerm cell tumor

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Teratoma Generation in the Testis Capsule
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Area of Science:

  • Oncology
  • Genetics
  • Reproductive Medicine

Background:

  • Familial testicular germ cell tumors are documented, but rare instances of germ cell malignancies in siblings of opposite sexes are seldom reported.
  • Germ cell tumors (GCTs) represent a significant portion of cancer diagnoses in young adults, with a known hereditary component in some cases.

Observation:

  • A case involving a sister with ovarian dysgerminoma and her brother with disseminated testicular malignancy, including cardiac involvement, is presented.
  • The brother's condition rapidly progressed despite aggressive medical intervention, leading to a fatal outcome.

Findings:

  • The co-occurrence of distinct GCTs in siblings of different sexes strongly suggests an underlying genetic predisposition.
  • A literature review identified only six previously reported families with similar sibling GCT occurrences.

Implications:

  • This case underscores the importance of considering genetic factors in the etiology of familial germ cell malignancies.
  • Further investigation into the genetic underpinnings of GCTs may reveal novel diagnostic and therapeutic targets for affected families.