\\\develops a hacking cough 3 months ago, loses 4 stone in weight, develops pain in right shoulder and pain in chest. Loses use of right hand (unable to grip anything). \\\\
If and a big if, these symptoms are due to lung cancer, wherever in the lung, then they indicate a marked degree of spread and should well be seen on routine chest X-Ray.
Yes ,I do agree with slaney that at the onset of growth, an apical cancer may be difficult to spot............but these symptoms would suggest that we are not dealing with an early cancer.