網膜格子様変性による網膜剥離の年少症例3例

Three children developed retinal detachment due to lattice degeneration

　網膜格子様変性による小児の網膜剥離の3症例を経験した。症例1は4歳男で両眼ともに強度近視眼であった。網膜剥離眼はPVRD2のため原因病巣は不明であるが，僚眼に完成された網膜格子様変性を認めたため，網膜格子様変性が原因病巣と推定した。症例2,3は5歳男で両眼ともに中等度近視眼であり，網膜剥離眼は明らかな網膜格子様変性を伴った。僚眼には網膜円孔・限局した網膜剥離を伴う完成された網膜格子様変性を認めた。これらの3症例は我々の知る限りでは網膜格子様変性による網膜剥離の最年少症例である。網膜格子様変性は4〜5歳において既に完成された形態を取り得，またこの時期から網膜剥離の原因病巣として注意する必要性があると考えた。

We observed 3 children in whom lattice degenera-tion seemed to have induced retinal detachment. The first case, a 4-year-old boy, presented with severe rhegmatogenous retinal detachment, PVRD2, in his highly myopic right eye. The path-ogenesis of the retinal break could not be identified. The fellow eye showed well-developed lattice degeneration with trophic retinal holes. A similar lesion seemed to have caused the retinal detach-ment in the affected eye. The other 2 cases wereboys, aged 5 years each. Retinal detachment with lattice degeneration was present in one eye each. The fellow eyes showed well-developed lattice degeneration with trophic retinal holes and sub-clinical retinal detachment. These eyes were moder-ately myopic. We performed scleral buckling proce-dure in all the 3 eyes. The fellow eyes were treated by cryopexy. In one of 2 eyes with subclinical retinal detachment, the detachment later extended to involve the macula. This was successfully treat-ed by scleral buckling procedure. To our klowled-ge, these 3 cases are the youngest ones of retinal detachment caused by lattice degeneration. It is to be noted that lattice degeneration may induce retinal detachment at an early age of 4 or 5 years.