Differential Diagnosis for 20-year-old Male with Central Abdominal Pain
Single Most Likely Diagnosis
- Gastroenteritis: This is the most likely diagnosis given the patient's symptoms of central abdominal pain, loose stools, and emesis, which are consistent with a viral or bacterial infection of the gastrointestinal tract. The recent travel to Mexico and onset of symptoms after return also support this diagnosis.
Other Likely Diagnoses
- Irritable Bowel Syndrome (IBS): Although less likely given the acute onset, IBS could be considered if the patient has a history of similar symptoms. However, the recent travel and emesis make this less likely.
- Food Poisoning: The patient's symptoms could be consistent with food poisoning, especially given the recent travel to Mexico. However, the lack of fever and specific food exposure makes this less likely.
- Viral Gastroenteritis: This is similar to the single most likely diagnosis but is worth considering separately as it could be caused by a different pathogen.
Do Not Miss Diagnoses
- Appendicitis: Although the patient does not have classic signs of appendicitis, such as localized right lower quadrant pain, it is essential to consider this diagnosis due to its potential severity and need for prompt surgical intervention.
- Intestinal Obstruction: This is a less likely diagnosis but could present with similar symptoms. It is crucial to consider this diagnosis due to its potential for severe complications if missed.
- Mesenteric Lymphadenitis: This condition can mimic appendicitis and is essential to consider in the differential diagnosis.
Rare Diagnoses
- Inflammatory Bowel Disease (IBD): Although rare, IBD could present with similar symptoms. However, the acute onset and lack of other symptoms, such as weight loss or blood in stool, make this less likely.
- Giardiasis: Given the patient's travel history, giardiasis is a rare but possible diagnosis. However, the lack of fever and specific exposure history makes this less likely.
- Amoebiasis: Similar to giardiasis, amoebiasis is a rare diagnosis that could be considered given the patient's travel history. However, the lack of fever and specific exposure history makes this less likely.