A worker develops weakness in forearm flexion and sensory loss along the lateral forearm. Which nerve is injured?

All of the following polyps are hamartomatous polyps EXCEPT:

A 55-year-old man has a 5-cm submucosal jejunal mass and is resected.  The specimen shows nests and trabeculae of round cells with pink granular cytoplasm and salt-and-pepper chromatin.  His serum 5-hydroxyindoleacetic acid (5-HIAA) level is markedly increased.   Which of the following embryologic derivatives is most likely related to the cells in the mass?

A 67-year-old man has had a 4-kg weight loss and nausea for the past 6 months.  The upper endoscopy shows that the entire gastric mucosa is eroded and has an erythematous cobblestone appearance.  The gastrectomy specimen shows small and shrunken stomach with a rigid thickened wall.  Which of the following is most likely the diagnosis?

A 50-year old woman presents with weight loss, diarrhea and peripheral edema.  During the workup, the physician suspects Menetrier disease.  All of the following statements are true regarding this condition EXCEPT:

A 30-year-old man has sudden onset of hematemesis after he consumed large amount of alcohol.  Upper gastroesophageal endoscopy shows longitudinal tears at the gastroesophageal junction.  What is the most likely mechanism to cause his hematemesis?

Which dermatome is associated with the area that includes the umbilicus?

A 41-year-old woman has had diarrhea with weight loss for the past 6 months.  A biopsy specimen is taken from small intestine.  The patient begins a restricted diet with no wheat or rye grain products and has dramatic improvement.  Which of the following microscopic features is most likely to be seen in the biopsy specimen?

A 21-year-old man has had increasingly voluminous bulky frothy stools for the past years without melena.  Which of the following lab findings is most likely to  be present on examination of his stool?

The peripheral blood smear of an anemic patient shows hypersegmented polymorphonulcear leukocytes.  The serum gastrin is markedly increased.  Which of the following is most likely the diagnosis?