Associated with hypercalcemia [squids like Cal, the California surfer dude]
Oat cell carcinoma (a.k.a. small cell) [field of oats]
Hilar location
Very Strong association with smoking [cigarette & smoke from burning oats]
Poor prognosis [RIP]
Secretes ADH (syndrome of inappropriate ADH secretion=SIADH) & ACTH, resulting in water retention, hyperaldosteronemia, and Cushing syndrome [Burning oats bring on the rain to help extinguish the flames]