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. 2022 Aug 16;15(1):107.
doi: 10.1186/s13045-022-01332-1.

Genotype-phenotype associations within the Li-Fraumeni spectrum: a report from the German Registry

Affiliations

Genotype-phenotype associations within the Li-Fraumeni spectrum: a report from the German Registry

Judith Penkert et al. J Hematol Oncol. .

Abstract

Li-Fraumeni syndrome (LFS) is a cancer predisposition syndrome caused by pathogenic TP53 variants. The condition represents one of the most relevant genetic causes of cancer in children and adults due to its frequency and high cancer risk. The term Li-Fraumeni spectrum reflects the evolving phenotypic variability of the condition. Within this spectrum, patients who meet specific LFS criteria are diagnosed with LFS, while patients who do not meet these criteria are diagnosed with attenuated LFS. To explore genotype-phenotype correlations we analyzed 141 individuals from 94 families with pathogenic TP53 variants registered in the German Cancer Predisposition Syndrome Registry. Twenty-one (22%) families had attenuated LFS and 73 (78%) families met the criteria of LFS. NULL variants occurred in 32 (44%) families with LFS and in two (9.5%) families with attenuated LFS (P value < 0.01). Kato partially functional variants were present in 10 out of 53 (19%) families without childhood cancer except adrenocortical carcinoma (ACC) versus 0 out of 41 families with childhood cancer other than ACC alone (P value < 0.01). Our study suggests genotype-phenotype correlations encouraging further analyses.

Keywords: Cancer predisposition; Genotype; Li-Fraumeni syndrome; Phenotype; TP53.

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Conflict of interest statement

The authors declare that they have no competing financial interests.

Figures

Fig. 1
Fig. 1
Spectrum of TP53 germline variants and statistically significant genotype-phenotype correlations. Colored spheres refer to different patients harboring the corresponding variant. Note: Y103* is based on two different nucleotide substitutions; whole gene deletions include two gross deletions with differing breakpoints. The genotype–phenotype correlation was based on data from 94 families. CNV, Copy number variation
Fig. 2
Fig. 2
Tumor spectrum in patients with LFS or attenuated LFS. Depicted are all neoplasms reported in the cohort’s individuals (not their families), including subsequent neoplasms occurring in patients with multiple tumors. “Miscellaneous” neoplasms include gastrointestinal, renal, lung, ovarian/tube, melanoma, prostate, and single other (lymphoma, cervical, parotis, basalioma, laryngeal) neoplasms. ACC Adrenocortical carcinoma, BC Breast cancer, CML Chronic myeloid leukemia, CNS Central nervous system, CPC Choroid plexus carcinoma, hematol. Hematological, MB Medulloblastoma, NB Neuroblastoma, NRSTS Non-rhabdomyosarcoma soft tissue sarcoma, OS Osteosarcoma, RMS Rhabdomyosarcoma

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