Stomach tumours

Benign tumours are reported in 5-25% of autopsies but are very uncommon clinical problems. Types:

• epithelial
  • adenoma:
    • single - polyp
    • multiple - gastric polyposis
  • leiomyoma

connective tissue:

þþ fibroma

• neurofibroma
• vascular
  • haemangioma

Malignant:

• primary - the most common gastric neoplasm:
  • adenocarcinoma - 95%
  • lymphoma }
  • leiomyosarcoma } 5%
  • carcinoid }
• secondary - uncommon. Sources include:
  • as part of a generalised lymphomatosis or leukaemia
  • less commonly, spread from a breast carcinoma or malignant melanoma
  • spread from adjacent intestinal organs e.g. pancreas.