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What is Sarcoma botryoides is mostly seen in - and explain in detail?
Sarcoma botryoides (Embryonal rhabdomyosarcoma) 

Sarcoma botryoides is an uncommon vaginal tumor most frequently found in infants and in children younger than 5 years of age.
The tumor consists predominantly of malignant embryonal rhabdomyoblasts.
The tumor have the appearance and consistency of grape like clusters.