Palliative care and musical theater may seem like an unexpected pairing, but they converge beautifully in the new production of “Night Side Songs.” This innovative musical, crafted by Daniel and Patrick Lazour, delves into the complexities of living with cancer through a compelling narrative that brings together doctors, patients, and caregivers.Under the guidance of renowned palliative care specialist Susan Block, the creators explored the emotional depth and nuances of terminal illness, opening a dialogue that is often avoided in everyday conversations.