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Hereditary Diffuse Infiltrating Retinoblastoma.

Katharina J E Schedler¹, Peter G Traine¹, Dietmar R Lohmann²

¹a Department of Ophthalmology , Clinic Pallas , Olten , Switzerland .

Ophthalmic Genetics

|June 4, 2014

Summary

This summary is machine-generated.

Diffuse infiltrating retinoblastoma, a rare childhood cancer subtype, can occur in families with a hereditary predisposition. This study found the condition can develop even with a known RB1 gene mutation, challenging previous assumptions.

Keywords:

Genetics retina retinoblastoma

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Area of Science:

Pediatric Oncology
Cancer Genetics
Ophthalmology

Background:

Retinoblastoma is a common childhood eye cancer.
Diffuse infiltrating retinoblastoma (DIR) is a rare, typically sporadic subtype.
Hereditary retinoblastoma is often bilateral and diagnosed early.

Observation:

A family presented with three affected children: one with unilateral DIR and two with bilateral retinoblastoma.
The girl with DIR was diagnosed at age 8.
Her brothers were diagnosed with bilateral retinoblastoma within their first two years of life.

Findings:

Genetic analysis revealed a shared heterozygous oncogenic RB1 gene mutation in the affected girl, her brothers, and the father.
This mutation is linked to hereditary retinoblastoma.
The girl with DIR carried the same mutation as her brothers with bilateral retinoblastoma.

Implications:

Diffuse infiltrating retinoblastoma can arise in individuals with a hereditary retinoblastoma predisposition.
This finding expands the understanding of retinoblastoma genetics and clinical presentation.
Highlights the importance of genetic counseling and testing in families with retinoblastoma, regardless of subtype or later onset.