An association between the 4G polymorphism in the PAI-1 promoter and the development of aggressive fibromatosis (desmoid tumor) in familial adenomatous polyposis patients

A Case Report on Gardner Syndrome With Dental Implant Treatment and a Long-Term Follow-Up

A case of Gardner syndrome (GS) in a 37-year-old woman is presented in which rehabilitation with dental implant treatment was followed for 7 years. The course of diagnostics and treatment is followed through an overview of 45 tissue biopsy and cytology samples during a period of 30 years. The patient was diagnosed with GS after a routine review of an oral panoramic radiograph presenting with multiple osteomas and multiple unerupted supernumerary teeth. Biopsy results and surgical procedures with histopathologic diagnoses from 1986 to 2016 are presented. Histologic analysis of the sampled jawbone showed a picture similar to an osteoid osteoma. The installed implant was functionally stable, with no clinical or radiographic events observed at yearly visits, for 7 years. In 1991, benign tumors appeared; in 2014, multiple adenomas were found in the small intestine and rectum. This case report shows the potential for dental implant treatment in a patient with GS.

Desmoid cell motility is induced in vitro by rhEGF

Desmoid tumors are benign but locally invasive myofibroblastic lesions that arise predominantly in the abdominal wall or shoulder and are prone to aggressive local recurrences. A perceived association between desmoid activity and the expression of growth factors during pregnancy or following trauma suggests a cause-and-effect relationship between growth factor stimulation and desmoid invasiveness. We used Boyden Chambers to quantify cell motility in order to determine the effect of growth factor stimulation on desmoid cell migration. Desmoid cell cultures were treated under serum-free conditions with epidermal growth factor (rhEGF) or transforming growth factor alpha (rhTGFalpha). Additional cell cultures were pretreated under serum-free conditions with the EGF receptor (EGFR) inhibitor AG1478, alone or in combination with the TGFbeta1 receptor inhibitor SB431542, and then stimulated with growth factor prior to being assayed for cell motility. The experiments demonstrated a direct dose-dependent relationship between rhEGF stimulation and desmoid motility. In contrast, rhTGFalpha was less effective at inducing cell migration. rhEGF-induced cell migration could be diminished, but not reduced to control levels, by inhibiting EGFR. When EGF and TGFbeta1 receptors were inhibited simultaneously, the level of rhEGF-induced cell migration was reduced significantly beyond the level of cell migration generated by inhibition of EGFR alone.