Hi, My dad 75 has been having trouble swallowing for about 4 weeks now and he's recently had a biopsy at the local hospital. The practitioner said it looks cancerous but wants to make sure and sent off his biopsy . He also had a full body ct scan the following day to see if anything had spread. My dad doesn't have any other symptoms or pains elsewhere..could this be very early stages?? I've read about it and if it's caught early the operation can resolve the problem...how severe is this?