Normal mucosa overlying a nested growth pattern of tumor cells

56 year old presenting with a mediastinal and ovarian mass. During surgical excision, a small nodule was palpated in the jejunum and a capsular lesion detected in the liver.

-small intestinal carcinoids usually present with mets at time of presentation

-common to see greater amount of metastatic disease (either lymph nodes or liver) than primary tumor

-generally treated by complete surgical resection (chemotherapy usually not effective)

-Type A (nested growth pattern most common)

-tumor can cause hypertrophy of muscularis propria which, combined with local fibrosis, often leads to "kinking" of small bowel and obstruction Liver : Carcinoid Tumor