This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
20 year old, soft to firm reddish swelling, progressing in size over the precordium. Histopathological examination showed the following.  What could be your possible diagnosis? 
Select and explain. 
A. Hemangioma, B. Fibroadenoma, C. Lipoma, D. Dermatofibroma
A: Hemangioma
Answer: A: Hemangioma 
Explanation: Ref. Robbins Pathology. 9th edition. Page. 517
 
Hemangioma
These tumours are slow growing and are generally asymptomatic unless they exert mass effect on sensitive structures.
 
Microscopy

Closely packed spindle cells with spaces containing little blood
Lumens may be thrombosed or organized, hemosiderin present due to rupture
Scant fibrous stroma