<prompt> In CA stomach, T4 lesion meansInvolved till serosaInvolved till lamnia propriaInvolved till submucosaInvolved till muscularis propria  <response>: T1a Tumour involves lamina propria T1b Tumour involvessubmucosaT2 Tumour invades muscularis propriaT3 Tumour involves subserosa T4a Tumour perforates serosaT4b Tumour invades adjacent organsBailey and love 27e pg: 1135 