A 28-year-old man presents with complaints of diarrhea, fecal urgency, and weight loss. He has also noted tender, red bumps on his shins and complains of pain and stiffness in his elbows and knees. Sigmoidoscopy reveals discontinuous, granulomatous lesions; no blood is detected in his stool. Which of the following diagnoses would his care team first suspect?

a. Crohn disease
b. Ulcerative colitis
c. Diverticulitis
d. Colon cancer

a. "Crohn disease"

Explanation:

The care team will first suspect with the diagnosis of Crohn's disease. Crohn's disease is an inflammatory bowel disease (IBD) which causes inflmmation in digestive tract and lead to diarrhea, fatigue, fecal urgency, and  weight loss. The inlfammation affects the bowel tissue as well in Crohn's disease.

All the symptoms of the person are same as noticed in Crohn's disease, so the person will be first suspected to have Crohn's disease.

Hence, the correct option is a. "Crohn disease"