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Ulcers of Intestine
SLOs
• Classification
• Salient features – Pathogenesis – Gross – Histology – Complications
Ulcer
“Ulcer is a breach in the continuity of skin,
epithelium or mucous membrane caused by
sloughing out of inflammed necrotic
tissue”
Intestinal Ulcers
Peptic
• Duodenal
Infection
• Bacterial • Virus • Protozoa
Immune
• GVHD• Crohn• Ulcerative
Malignant
• Carcinoma
Duodenal Peptic Ulcer
Pathogenesis
Gross
Necrotic slough
Rounded edge
Sharp edge
Histopathology
Necrotic slough
Non-specific inflammtion
Granulation tissue
Fibrosis
Complications
Bleeding Perforation
Penetration Stenosis
Malignancy
Typhoid ulcer
Salmonella typhimurium Salmonella paratyphi
Pathogenesis
Gross
Peyer’s patches
Oval ulcers
Long axis
Histopathology
Aggregates of macrophages
Typhoid nodules
Complications
Bleeding Perforation
Tuberculosis ulcer
Mycobacterium tuberculosis Mycobacterium bovis
Pathogenesis
Gross
Transverse ulcers
Short axis
Direction of lymphatics
Histopathology
Epithelioid cell granuloma
Complications
Bleeding Stenosis
Amoebic ulcer
Entamoeba histolytica
Pathogenesis
Gross
Pin –point ulcers
Nodules
Histopathology
Flask shaped ulcer
Complications
Bleeding Perforation
Obstruction
Pseudmembranous colitis
Clostridium difficile
Pathogenesis
Gross
Cap lesion
Pseudomembrane
Histopathology
Mushroom / Volcanic eruption
Complications
Malabsorption Toxic megacolon
CMV Colitis
Pathogenesis
Gross
Erythematous base
Haemorrhagic
Histopathology
Inflammation
CMV inclusion
Complications
Malabsorption
Ulcerative colitis
Pathogenesis
Gross
Continuous
Wide ulcers
Pseudopolyps
Histopathology
Blunting and distortion of
villi
Cryptitis
Crypt abscess
Complications
Malabsorption Toxic megacolon
Carcinoma
Crohn’s disease
Pathogenesis
Gross
Skip lesions
Serpengious ulcers
Cobblestone
Histopathology
Transmural
Fissure
Granuloma
Complications
Malabsorption Fistula
Strictures Carcinoma
Graft versus host disease
Pathogenesis
Gross
Pin point
Haemorrhagic
Histopathology
Apoptosis
Intra-epithelial lymphocytes
Complications
Malabsorption Haemorrhage
Carcinoma
Pathogenesis
Gross
Ulceroproliferative
Rolled up indurated
Histopathology
Irregular glands
Dysplasia
Complications
Obstruction Metastases
Summarise
Questions