SUN-935 Invasive Neuroendocrine Breast Carcinoma Presenting as Liver Metastases

Introduction: Primary neuroendocrine carcinoma of the breast is rare and must be differentiated from metastatic neuroendocrine carcinoma from the gastrointestinal tract. Clinical Case: A 66-year-old white female presented to the outpatient clinic complaining of abdominal fullness with unintentional weight loss of over 30 pounds over 3 months. She had no nausea, vomiting, diarrhea, or constipation. During initial evaluation, she had hepatomegaly with the liver edge palpable 4 cm below the costal margin. Laboratory studies are within normal limits except for elevated alkaline phosphatase at 369 U/L (n