Soft tissue lymphoma is a very rare clinical entity with varying presentation characteristics and atypical clinical and imaging features. Besides, B-cell lymphoma, unclassifiable, with features intermediate between diffuse large B-cell lymphoma and Burkitt lymphoma is a new category of malignancy of B-cell lymphoma according to the 4(superscript th) edition of the World Health Organization Classification of Tumours of Haematopoietic and Lymphoid Tissues (2008). We present here a case of this tumor located in the abdominal wall with invasion to colon, treated by means of surgical intervention and chemotherapy.