Later, cough, pain, blood in sputum, and breathlessness develop. By the time the
lung cancer spreads to other organs (brain, adrenals, bone, and others) the patient is quite sick, and displays symptoms related to the organ involved (for example seizures, severe bone pain etc).
A metaststic lung cancer would not usually present with some palpable bumps (lipoma) over your lower back.
I hope you have quit smoking by now.
Good luck!