How does exophytic growth in retinoblastoma typically present?

In retinoblastoma, exophytic growth typically presents with the accumulation of subretinal fluid, leading to retinal detachment. This growth pattern occurs when the tumor expands outward into the vitreous cavity, pushing against the retina and causing it to detach from the underlying layers. The presence of subretinal fluid is a direct consequence of this tumor's proliferation, as it disrupts the normal retinal architecture and can lead to symptoms such as vision changes.

In contrast, the other presentation options describe different characteristics or stages of retinoblastoma that do not align with the described exophytic growth nature. Flat infiltration without a discrete mass does not reflect the prominent and aggressive nature of exophytic tumors. A white mass surrounded by retinal vessels is more characteristic of a tumor growing linearly rather than outward. Lastly, infiltration of adjacent ciliary vessels would suggest a different growth pattern without the typical features of exophytic behavior. Thus, the presentation of subretinal fluid accumulation and potential retinal detachment accurately captures the essence of exophytic growth in retinoblastoma.