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Variable expressivity of the multiple nevoid basal cell carcinoma syndrome
Summary
Multiple nevoid basal cell carcinoma syndrome presents with variable expressivity, meaning not all symptoms appear in every patient. This genetic disorder includes subtle signs like intracranial calcifications and more obvious ones such as jaw cysts and skin tumors.
Area of Science:
- Dermatology
- Genetics
- Medical Syndromes
Background:
- Multiple nevoid basal cell carcinoma syndrome (Gorlin syndrome) is a rare genetic disorder.
- It is characterized by a predisposition to various cancers and developmental abnormalities.
Observation:
- Presents four cases of this syndrome.
- Highlights the variable expressivity of its numerous associated malformations.
- Notes that no single component is present in all affected individuals.
Findings:
- The classic triad includes jaw cysts, basal cell epitheliomas, and skeletal anomalies.
- More subtle, often overlooked features include intracranial calcifications, hypertelorism, and mental retardation.
- Other manifestations can involve ectopic calcification, cleft lip/palate, cutaneous cysts, and palmar/plantar dyskeratosis.
Implications:
- Emphasizes the importance of recognizing the variable expressivity of Gorlin syndrome.
- Suggests comprehensive evaluation for subtle signs to ensure accurate diagnosis.
- Underscores the need for early detection and management of associated cancers and developmental issues.