Fibrous Dysplasia: An Epidemiological and Correlational Study of Anthropometric, Clinical, Treatment, and Genetic Data
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 200
- 试验地点
- 1
- 主要终点
- Description of surgical procedures
研究概览
简要总结
Fibrous dysplasia is a benign, pseudotumoral, genetic but non-hereditary condition characterized by the presence of one or more areas of abnormal bone development in which the normal structure is replaced by fibrous tissue. It is an extremely heterogeneous condition, as it can be monostotic, polyostotic, or panostotic, or it may occur within the context of more complex syndromes such as McCune-Albright syndrome (in which polyostotic fibrous dysplasia is associated with café-au-lait spots and precocious puberty) or Mazabraud syndrome (in which intramuscular myxomas are present).
This condition is caused by post-zygotic missense mutations, so it is never hereditary, and the affected individual will constitute a so-called "genetic mosaic," a fact that explains the wide variability in the localization of the pathological areas. The mutations in question occur in a gene (GNAS) located on chromosome 20 (20q13.2-13.3); this gene encodes a G protein with GTPase activity, the function of which is consequently impaired.
The aim of this study is to evaluate in detail the characteristics of the patients, their hospitalizations, and related interventions. Given the rarity of the condition, such investigations are often conducted on very limited datasets. The present study is expected to include over 200 patients, providing a comprehensive picture.
An additional aim is to assess the impact of somatic mutations in the GNAS gene and their impact in terms of clinical manifestations.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •All patients affected by Fibrous Dysplasia, McCune-Albright syndrome and Mazabraud syndrome (retrospectively included from 2009)
- •Availability of clinical and radiological data collected during their recovery at the IOR
- •Availability of tumor tissue in the biobank in sufficient quantity and quality
排除标准
- •Patients who do not meet the inclusion criteria
研究组 & 干预措施
Fibrous Dysplasia, McCune-Albright syndrome patients with available tissue sample
All patients affected by Fibrous Dysplasia, McCune-Albright syndorme and Mazabraud syndrome with an available tissue biospecimens for molecular investigation
All patients affected by Fibrous Dysplasia, McCune-Albright syndorme and Mazabraud syndrome
All patients affected by Fibrous Dysplasia, McCune-Albright syndorme and Mazabraud syndrome with available clinical, radiological and surgical data
结局指标
主要结局
Description of surgical procedures
时间窗: 4 years
Analyze the correlation between the reason for hospitalization (e.g. pain, fractures, etc.), the resulting type of procedure (categorized surgical procedures), and the patients' characteristics considering age (years), sex (male or female), lesion dimension (in cm).
次要结局
- Natural History of Fibrous Dysplasia(4 years)
- Genotype-phenotype correlation(4 years)
- Post-interventions complications and pain(4 years)
研究者
Luca Sangiorgi
Head of Departement of Rare Skeletal Disorders
Istituto Ortopedico Rizzoli