Category Nuances for null:

• gastric,
• gastroduodenal,
• gastrointestinal,
• intestinal,
• neoplastic,
• gi,
• metastatic,
• solid,
• epithelial,
• significant,
• severe,

Simple Categories for null:

• disease,
• tumor,
• carcinoma,
• malignancy,
• tumour,
• cancer,