atlases cancer cytodiagnosis cytology diagnosis differential digestiveorgans digestivesystem diseases etc examination examinations gastrointestinaldiseases gastrointestinalsystem handbooks lung lungneoplasms lungs manuals melanoma needlebiopsy neoplasms pathology questions qy95n576e qz17n576e1993 skin sputum stomach stomachneoplasms wf17s119d1986 wi17t137a1983 wi320g448e1968