AANP Family Nurse Practitioner (FNP) Certification ExamDiagnosisEasy
A 35-year-old female presents with a 6-month history of diffuse, dull, aching pain in her lower abdomen, associated with alternating episodes of constipation and diarrhea. She reports significant bloating and gas, and symptoms are often worse after eating and relieved by a bowel movement. Physical examination is unremarkable, and routine lab tests (CBC, CMP, TSH) are all within normal limits. She denies weight loss, fever, or rectal bleeding. What is the most appropriate initial diagnosis?
- ACeliac Disease
- BUlcerative Colitis
- CIrritable Bowel Syndrome (IBS)
- DCrohn's Disease
Show answer & explanationAnswer & explanation
Correct answer: C. Irritable Bowel Syndrome (IBS)
The patient's chronic abdominal pain, altered bowel habits (constipation and diarrhea), bloating, and relief with defecation, in the absence of 'red flag' symptoms like weight loss or bleeding, and normal routine labs, are highly characteristic of Irritable Bowel Syndrome (IBS).
Why the other options are wrong
- A. Celiac disease typically presents with malabsorption symptoms (diarrhea, weight loss, abdominal pain), and specific diagnostic tests (serology, biopsy) would be abnormal.
- B. Ulcerative colitis is characterized by bloody diarrhea, tenesmus, and often systemic symptoms, which are not present here.
- D. Crohn's disease is an inflammatory bowel disease often associated with weight loss, fever, bloody stools, and abnormal inflammatory markers.
Irritable Bowel Syndrome (IBS)
A common functional gastrointestinal disorder characterized by chronic abdominal pain and altered bowel habits (diarrhea, constipation, or both) without any identifiable structural or biochemical cause.
- Diagnosis based on Rome IV criteria.
- Symptoms include abdominal pain, bloating, gas, and changes in stool frequency/consistency.
- Often exacerbated by stress and certain foods; no 'red flag' symptoms.
Memory trick: IBS: Irregular Bowel Symptoms, Stress-related.