An interesting case of screen-detected breast cancer encasing a ventriculoperitoneal shunt was published recently in BMJ Case Reports, 2013, 1757-790X (2013)
Abstract: A 67-year-old woman was diagnosed with a breast cancer via screening encasing the ventriculoperitoneal shunt. Triple assessment including MRI scan of the breast confirmed the presence of a breast mass and the tubing of the ventriculoperitoneal shunt was running directly through the mass. She underwent wide local excision of the breast cancer as well as rerouting of VP shunt as a joint procedure with the neurosurgery team and recovered uneventfully. This is a very rare and an interesting case and required management involving a different specialty.
Source: Embase