ABSTRACT
Most inherited TP53 mutations have been identified in individuals with a family cancer predisposition syndrome, in which the activity of p53 mutants is severely reduced. However, germline p53 mutants in children with 'sporadic' adrenocortical or choroid plexus tumors exhibit a wide range of functional activity. Here, we demonstrate the occurrence of a complex germline TP53 mutation in two unrelated families with different cancer phenotypes, neither fulfilling the classic criteria for Li-Fraumeni syndrome. The TP53 mutation consists of a duplication of 7 bp in exon 4, resulting in a frame shift and premature stop signal. Haplotype analysis indicated that the mutation arose independently in the two families. Analysis of the DNA secondary structure predicts the TP53 mutation occurred within a hairpin loop. Additional germline complex mutations occurring within the same region of exon 4 have been identified in the IARC database. Our findings suggest that certain TP53 regions are prone to intrinsic genetic alterations, possibly through defects in DNA replication or repair. Further, carriers of the same TP53 mutation can have diverse cancer profiles, illustrating the complexity of genetic counseling and risk prediction.
ABSTRACT
Limphangioma or cystic higroms is a benign tumour constituted by capillar or cavernous limpha channels, which are uncommon in oral cavity. A worldwide bibliographic revision was done to unified opinions and a case which was treated at Specialities Hospital of Medical Center la Raza, Mexican Social Security Institute, is shown in this article.
Subject(s)
Lymphangioma/pathology , Mouth Neoplasms/pathology , Adult , Female , HumansABSTRACT
This is a case report of a median mandibular cyst in a 30 years-old male, treated at the Maxillofacial Service of the "Hospital de Especialidades del Centro Médico La Raza", I.M.S.S. It includes clinical, radiological and histological features plus a review of bibliography, in order to analyze the established parameters and arrive at a diagnosis.
