Abstract
Anaplastic large cell lymphoma is an exceedingly rare subtype of non-Hodgkin lymphoma with fewer than 10 cases reported in the literature. We present a 64-year-old woman who presented with a pancreatic head mass, causing acute pancreatitis, which was eventually diagnosed as an anaplastic large cell lymphoma. The disease is very responsive to chemotherapy, further highlighting the importance of early recognition and treatment.