question: Hi,around 3 months ago,my friend had an annus surgery (to stop the pain and blood when entered to toilet)now after 3 mths of pain he discovered something like ball near the anus more to the left side, he did an MRI with the following result:MRI examination of the perineum was performed in the sagittal T2, coronal T1, T2, and Axial T1, T2 and STIR sequences. additional post Gadolinium coronal and axial T1 sequences were also obtained.there is a 1.5 cm fluid collection in the left perianal region at around 3 o'clock with surrounding edematous changes, it appears hypointense on T1,hyper on T2,STIR with peripheral enhancement following IV gadolinium administration and is compatible with a small abscess. the levator ani muscles are normal. no other gross abnomalities are seen. should he perform another surgery to remove it? is it dangerous?, could it be cancerous???? i'm really concerned  thank you in advance for your feedback