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Molecular Testing for Chondroid Lipoma

Last updated Feb. 28, 2017


What are other Names for this Test? (Equivalent Terms)

  • Gene Mutation Analysis for Chondroid Lipoma
  • Test for Molecular Diagnosis of Chondroid Lipoma

What is Molecular Testing for Chondroid Lipoma? (Background Information)

  • Molecular Testing for Chondroid Lipoma is a genetic test that is helpful in aiding a diagnosis of chondroid lipoma. The lab test results may also be subsequently useful in taking appropriate treatment decisions
  • Chondroid lipoma is a very rare and well-defined, benign fatty tumor. It is named so, because the fat cells are present in a cartilage background
  • It is a slow-growing tumor that is observed predominantly on the arms and legs in women. Chondroid lipomas are deep-seated tumors and usually do not cause any signs and symptoms; they are also often painless

The cause of chondroid lipoma is due to genetic mutations. Currently, studies indicate defects in the following gene:

  • C11orf95-MKL2 causing chromosomal translocation abnormality namely t(11;16)(q13;p13)

The above genetic abnormality can be detected using molecular studies, which may play a significant role in identifying the tumor type, and in some cases, helping the healthcare provider take appropriate treatment decisions.

The molecular testing, in general, can be performed using a variety of methods. Some of these methods include:

  • In situ hybridization technique, such as fluorescence in situ hybridization (FISH)
  • Immunohistochemistry (IHC)
  • Next-generation sequencing (NGS)
  • Polymerase chain reaction (PCR)
  • Comparative genomic hybridization (CGH)
  • Karyotyping including spectral karyotyping
  • mRNA analysis
  • Tissue microarrays (TMAs)
  • Southern blot test
  • Northern blot test
  • Western blot test
  • Eastern blot test

The methodology used for chondroid lipoma may vary from one laboratory to another. 

Note: Molecular testing has limitations due to the molecular method and genetic mutational abnormalities being tested. This can affect the results on a case-by-case basis. Consultation with your healthcare provider will help in determining the right test and right molecular method, based on individual circumstances.

What are the Clinical Indications for performing the Molecular Testing for Chondroid Lipoma Test?

Molecular Testing for Chondroid Lipoma is undertaken in the following situations: 

  • To assist (and in some cases, confirm) the initial diagnosis of chondroid lipoma
  • To distinguish other tumors/conditions that have similar histological features, when examined by a pathologist under the microscope
  • To help in determining treatment options
  • To confirm recurrence of the tumor: Tumor recurrence can either be at the original tumor site, or at a distant location (away from the initial site)

How is the Specimen Collected for Molecular Testing for Chondroid Lipoma?

Following is the specimen collection process for Molecular Testing for Chondroid Lipoma:

The specimen sample requirements may vary from lab to lab. Hence, it is important to contact the testing lab for exact specimen requirements, before initiating the testing process.

  • Sample required:
    • Fresh tumor tissue during biopsy
    • Formalin-fixed paraffin-embedded solid tumor tissue (FFPE tumor tissue), often referred to as paraffin block of the tumor
    • Unstained tissue slides
  • Process of obtaining the sample: As outlined by the laboratory testing facility
  • Preparation required: As outlined by the laboratory testing facility

Note:

  • Depending on the location of testing, it may take up to 2 weeks’ turnaround time, to obtain the test results
  • Occasionally, additional samples may be required to either repeat the test or to perform follow-up testing
  • Many hospitals preserve the paraffin blocks for at least 7 years. In general, older paraffin blocks (over 5 years) may affect the detection of specific mutations, due to degradation of the tumor specimen over time

Cost of Molecular Testing for Chondroid Lipoma:

  • The cost of the test procedure depends on a variety of factors, such as the type of your health insurance, annual deductibles, co-pay requirements, out-of-network and in-network of your healthcare providers and healthcare facilities
  • In many cases, an estimate may be provided before the test is conducted. The final amount may depend upon the findings during the test procedure and post-operative care that is necessary (if any)

What is the Significance of the Molecular Testing for Chondroid Lipoma Result?

The significance of Molecular Testing for Chondroid Lipoma is explained:

  • Presence of a positive test result helps aid, and in some cases, confirm the diagnosis of chondroid lipoma
  • The result can help exclude other tumors with similar histological features
  • It can help determine the prognosis of the patient
  • In some cases, the test results may help in taking treatment decisions

The laboratory test results are NOT to be interpreted as results of a "stand-alone" test. The test results have to be interpreted after correlating with suitable clinical findings and additional supplemental tests/information. Your healthcare providers will explain the meaning of your tests results, based on the overall clinical scenario.

Additional and Relevant Useful Information:

  • Many laboratories may not have the capability to perform this test. Only highly-specialized labs with advanced facilities and testing procedures may perform this test
  • Additional mutations are still being discovered in many of these tumors. This may further contribute towards tumor diagnosis and treatment. Please consult with your healthcare provider for any information updates

Certain medications that you may be currently taking may influence the outcome of the test. Hence, it is important to inform your healthcare provider of the complete list of medications (including any herbal supplements) you are currently taking. This will help the healthcare provider interpret your test results more accurately and avoid unnecessary chances of a misdiagnosis.

What are some Useful Resources for Additional Information?

The following DoveMed website link is a useful resource for additional information:

http://www.dovemed.com/diseases-conditions/chondroid-lipoma/

Please visit our Laboratory Procedures Center for more physician-approved health information:

http://www.dovemed.com/common-procedures/procedures-laboratory/

References and Information Sources used for the Article:

https://ghr.nlm.nih.gov/primer/testing/genetictesting (accessed on 02/17/2017)

https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5806a1.htm (accessed on 02/17/2017)

http://www.nature.com/gim/journal/v10/n5/full/gim200852a.html (accessed on 02/17/2017)

http://pediatrics.aappublications.org/content/106/6/1494 (accessed on 02/17/2017)

http://atlasgeneticsoncology.org/Tumors/ChondroidLipomaID5164.html (accessed on 02/17/2017)

https://www.hindawi.com/journals/sarcoma/2011/638403/ (accessed on 02/17/2017)

https://www.ncbi.nlm.nih.gov/pubmed/22607659 (accessed on 02/17/2017)

Helpful Peer-Reviewed Medical Articles:

Carrano, A. V., et al. Measurement and purification of human chromosomes by flow cytometry and sorting. Proceedings of the National Academy of Sciences 76, 1382–1384 (1979)

Drets, M. E., & Shaw, M. W. Specific banding patterns of human chromosomes. Proceedings of the National Academy of Sciences 68, 2073–2077 (1971)

Druker, B. J. Perspectives on the development of a molecularly targeted agent. Cancer Cell 1, 31–36 (2002)

Parra, I., & Windle, B. High resolution visual mapping of stretched DNA by fluorescent hybridization. Nature Genetics 5, 17–21 (1993) doi:10.1038/ng0993-17

Pinkel, D., et al. High resolution analysis of DNA copy number variation using comparative genomic hybridization to microarrays. Nature Genetics 20, 207–211 (1998) doi:10.1038/2524

Speicher, M. R., et al. Karyotyping human chromosomes by combinatorial multi-fluor FISH. Nature Genetics 12, 368–375 (1996) doi:10.1038/ng0496-368

Huang, D., Sumegi, J., Dal Cin, P., Reith, J. D., Yasuda, T., Nelson, M., ... & Bridge, J. A. (2010). C11orf95‐MKL2 is the resulting fusion oncogene of t (11; 16)(q13; p13) in chondroid lipoma. Genes, Chromosomes and Cancer, 49(9), 810-818.

Thway, K., Flora, R. S., & Fisher, C. (2012). Chondroid lipoma: an update and review. Annals of diagnostic pathology, 16(3), 230-234.

de Vreeze, R. S., van Coevorden, F., Boerrigter, L., Nederlof, P. M., Haas, R. L., Bras, J., ... & de Jong, D. (2011). Delineation of chondroid lipoma: an immunohistochemical and molecular biological analysis. Sarcoma, 2011.

Heffernan, E. J., Lefaivre, K., Munk, P. L., Nielsen, T. O., & Masri, B. A. (2014). Ossifying lipoma of the thigh. The British journal of radiology.

Venkateswarlu, M., Geetha, P., & Srikanth, M. (2011). A rare case of intraoral lipoma in a six year-old child: a case report. International journal of oral science, 3(1), 43.

Escobar, E., Nguyen, B. D., & Colvin, O. C. (2014). PET/CT and MRI of chondroid lipoma of the deltoid muscle. Clinical nuclear medicine, 39(11), 984-987.

Berg, T., & Gorsky, M. (2010). Chondrolipoma of the tongue: a case report of a rare diagnosis. International journal of dermatology, 49(4), 441.

Setiawati, R., Dimpudus, F. J., & Sun, Z. (2012). Chondroid lipoma of the right thigh: Correlation of imaging findings and histopathology of an unusual benign lesion. Australas Med J, 5, 355-358.

Lau, S. K., Bishop, J. A., & Thompson, L. D. (2015). Spindle cell lipoma of the tongue: a clinicopathologic study of 8 cases and review of the literature. Head and neck pathology, 9(2), 253-259.

Reviewed and Approved by a member of the DoveMed Editorial Board
First uploaded: Feb. 28, 2017
Last updated: Feb. 28, 2017