LARGE INTESTINE - Malignant lymphoma

The specimen consists of a short length of large intestine showing a polypoidal mass some 6.0 cm in diameter protruding into the lumen and continuous with a large mass of tumour which extends through the bowel wall. An enlarged tumour containing lymph nodes can be seen on the posterior surface.
This woman presented at the age of 65 with a lump in her abdomen which she had felt herself. She had had 2 months episodic diarrhoea before this. The resected tissue comes from the transverse colon; enlarged lymph nodes were found in the mesocolon. Histologically the lesion is a poorly-differentiated lymphocytic lymphoma.