A child 14 years of age come to emergency depament with a history of blunt trauma abdomen. On examination Ballance's sign is found to be positive, otherwise the child is stable. Which of the following is not true statement?
A palpable tender mass can be felt in the left upper quadrant with persistent dullness It is due to extracapsular or subcapsular hematoma ( of spleen ) Managed with Conservative treatment Splenectomy is required