Here is what I call a "lumps and bumps map", a diagram on which you can record lumps, bumps, swellings, etc that you want to call to attention of your vet. Also record results of vet's exam or pathology report. If you have more than one dog, you will find keeping a series of diagrams very helpful in remembering which lumps are new and which are old and already investigated. Almost any lump should be seen by your vet and most need to be biopsied to find out if they are malignant or benign.
You can also use this to record markings or scars or other identifying features. I have made this drawing generic, with natural ears and natural tail.
Copy this image to your hard drive and then bring it into any image or paint program to double its size to have a full page diagram which you can print. If your printer has only a small amount of memory, you may want to convert the image to bitmap , ie black and white, before printing it. Or you may just want to copy the image to your hard drive and use as a template to keep equivalent records on your computer.