p53 Tumor Suppressor Gene Protein, Immunohistochemical, Paraffin Block

TEST: 481044
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CPT: 88360
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Synonyms

  • Tumor Suppressor Gene, p53

Special Instructions

Please direct any questions regarding this test to oncology customer service at 800-345-4363.

Expected Turnaround Time

3 - 5 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Formalin-fixed, paraffin-embedded (FFPE) tumor

Volume

One paraffin block

Container

Paraffin block transport pouch

Collection

Specimen should be fixed in 10% neutral-buffered formalin. Optimum fixation time is 12 to 24 hours, not to exceed 48 hours.

Storage Instructions

Maintain specimen at room temperature.

Test Details

Use

Alterations of the p53 tumor suppressor gene have been shown to serve as an independent prognostic marker in a wide variety of tumor types such as colorectal,1,2 breast,3,4 prostate,5 and bladder.6

Limitations

This procedure may be considered by Medicare and other carriers as investigational and, therefore, may not be payable as a covered benefit for patients.

Methodology

Immunohistochemistry (IHC)

Footnotes

1. Yamaguchi A, Kurosaka Y, Fushida S, et al. Expression of p53 protein in colorectal cancer and its relationship to short-term prognosis. Cancer. 1992 Dec 15; 70(12):2778-2784. 1451055
2. Starzynska T, Bromley M, Ghosh A, Stern PL. Prognostic significance of p53 overexpression in gastric and colorectal carcinoma. Br J Cancer. 1992 Sep; 66(3):558-562. 1520594
3. Allred DC, Clark GM, Elledge R, et al. Association of p53 protein expression with tumor cell proliferation rate and clinical outcome in node-negative breast cancer. J Natl Cancer Inst. 1993 Feb 3; 85(3):200-206. 8423624
4. Thor AD, Moore DH II, Edgerton SM, et al. Accumulation of p53 tumor suppressor gene protein: An independent marker of prognosis in breast cancers. J Natl Cancer Inst. 1992 Jun 3; 84(11):845-855. 1317462
5. Visakorpi T, Kallioniemi OP, Heikkinen A, Koivula T, Isola J. Small subgroup of aggressive, highly proliferative prostatic carcinomas defined by p53 accumulation. J Natl Cancer Inst. 1992 Jun 3; 84(11):883-887. 1350643
6. Sarkis AS, Dalbagni G, Cordon-Cardo C, et al. Nuclear overexpression of p53 protein in transitional cell bladder carcinoma: A marker for disease progression. J Natl Cancer Inst. 1993 Jan 6; 85(1):53-59. 7677935

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
481044 p53 Tumor Suppressor, Paraffin 14229-9 481047 p53 14229-9

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