Correct statistical method to use

Looking at a digital image of tissue. If I can measure the number of foci and area of tumor as well as the number of and area of nerves, is there a statistical method to estimate the expected number of times that the tumor and nerve would be in contact by chance? Does anyone know of a method or another study that has done something similar?
Are you asking how this image is likely to progress in time, or are you interested in probability of touching for other images (other people)?

Either way you need to record many images / people, not just one.