Sclerotic bone lesions in tuberous sclerosis complex: A genotype-phenotype study.

Area of Science:

• Medical Imaging
• Genetics
• Oncology

Background:

• Tuberous Sclerosis Complex (TSC) is a genetic disorder caused by pathogenic variants in TSC1 or TSC2 genes.
• TSC leads to mTOR pathway hyperactivation, affecting multiple organ systems including bone.
• Sclerotic bone lesions are recognized but not diagnostic features of TSC.

Purpose of the Study:

• To characterize sclerotic bone lesions in adult TSC patients using chest CT.
• To correlate the presence of bone lesions with TSC genotype.
• To enhance diagnostic accuracy and avoid misinterpretation of TSC-related bone findings.

Main Methods:

• Retrospective review of chest CT scans from 92 adult TSC patients.
• Detailed analysis of bone lesion characteristics and locations.
• Correlation of imaging findings with available TSC1/TSC2 mutational data.

Main Results:

• Sclerotic bone lesions were identified in 89% of the studied TSC cohort.
• Lesions predominantly involved the posterior vertebral elements.
• 86% of patients without bone lesions had negative TSC1/TSC2 mutational studies, suggesting a genetic link.

Conclusions:

• Sclerotic bone lesions are highly prevalent in adult TSC patients.
• These findings are important for differential diagnosis, particularly to exclude osteoblastic metastases.
• Further investigation into the genetic basis and clinical significance of TSC-related bone lesions is warranted.