惡性血管瘤化療與否?

我的拉拉年紀今年12y,在上星期突然昏倒送醫,發現脾臟腫大破裂,後來動了手術拿掉脾臟並送化驗,這星期報告出來是惡性血管瘤,雖說已摘除了患部,但報告出來說,似乎非原發處,但醫生在開刀後有跟我們說其他內臟似乎沒有受影響,我想請問一下醫師,以我家拉拉這種年紀,化療是否可行?因為我查遍網路上的資料,都說惡性血管瘤除了摘除發生的部位外,要再加上化療才可以增加存活率,否則幾乎是最長三個月的時間,但因為我家拉拉已經12y了,請問醫師是否有遇過12y仍化療的例子?若不化療,是否還有其他的方法呢?如中醫之類的
另外,因為他大概三個月前曾經睪丸突然一邊腫大,手術摘除後,化驗結果是良性血管瘤,是否有可能是那邊轉移過來呢?或者是當初切片沒有切到癌細胞誤判呢?睪丸有可能會出現惡性血管瘤的東西嗎?是否建議帶我家拉拉去照MRI呢?
此外,我想請問是否有什麼抗癌的藥物或是健康食品可以幫助他呢?
最後,我想問一個問題是,以這樣的癌症,若不化療,預後仍有多少時間?是否可以化療拼一拼?
希望醫師可以撥冗給我一點建議

以下是他的化驗報告:
The mass is composed of multiple variably sized and shaped vascular channels filled with varying numbers of erythrocytes. Each vascular structure is enclosed and lined by plump endothelial cells and aligned on small amount of pre-existing splenic trabeculae or fibrous stroma. The endothelial cells have minimal cytoplasm and enlarged, oval and finely stippled chromatic nuclei with single prominent nucleoli. The mitotic activity is 1/hpf in average. The septal collagen and several caverns show infiltration by numerous lymphocytes, plasma cells, some hemosiderin-laden macrophages and scattered hemosiderin. Along the affected region, there are large numbers of megakaryocytes. Focal area of specimen display hemorrhage and mild fibrosis