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A 14 year female patient

A 14 year female pt pain in epigastric region usg normal

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I now have enough high-quality information to give a thorough clinical answer. Here is my complete response:

14-Year-Old Girl - Epigastric Pain with Normal USG

This is a common and important clinical scenario. A normal abdominal ultrasound does NOT exclude most causes of epigastric pain - it primarily rules out gallstones, biliary pathology, and gross pancreatic/hepatic lesions.

Differential Diagnosis

1. Functional Dyspepsia (Most Likely)

The most common cause of epigastric pain in adolescents with a normal workup. By Rome IV criteria, this requires:
  • One or more of: bothersome postprandial fullness, early satiation, epigastric pain, or epigastric burning
  • No structural disease on upper endoscopy explaining the symptoms
  • Symptoms present for 3+ months, onset at least 6 months before diagnosis
It is subdivided into:
  • Epigastric pain syndrome (EPS) - epigastric pain/burning predominant
  • Postprandial distress syndrome (PDS) - early satiety/postprandial fullness predominant
Pathogenesis involves gastric dysmotility, visceral hypersensitivity, impaired fundic accommodation, and psychological factors (anxiety, depression, somatization) - all very relevant in adolescent girls. - Yamada's Textbook of Gastroenterology

2. H. pylori-Associated Gastritis / Peptic Ulcer Disease

H. pylori is the leading cause of secondary gastritis and peptic ulcer disease in older children/adolescents. The adolescent will describe epigastric burning pain in a pattern more typical of the adult. USG is normal in PUD.
  • Diagnosis: upper endoscopy with biopsy (positive culture or H. pylori gastritis on histopathology + one other positive biopsy-based test)
  • Confirmation of eradication: 2-step monoclonal stool H. pylori antigen test or ¹³C-Urea Breath Test
  • Tintinalli's Emergency Medicine
Risk factors to ask about: NSAIDs, aspirin, steroids, family history of PUD

3. Gastroesophageal Reflux Disease (GERD) / Esophagitis

Epigastric pain + heartburn + regurgitation. USG is normal. Can coexist with functional dyspepsia. A trial of PPI therapy can help differentiate.

4. Functional Abdominal Pain (Centrally Mediated Abdominal Pain Syndrome / CAPS)

Previously called functional abdominal pain syndrome. Continuous or near-continuous abdominal pain not related to meals or defecation. Associated with significant psychosocial stressors, anxiety, or depression.

5. Irritable Bowel Syndrome (IBS)

Epigastric/abdominal pain associated with defecation or change in bowel habits. Very common in adolescent girls.

6. Dysmenorrhea / Gynecological Causes

In a 14-year-old girl, always consider:
  • Primary dysmenorrhea - crampy pelvic/lower abdominal pain that can radiate to epigastrium around menses
  • Mittelschmerz (mid-cycle ovulation pain)
  • Ovarian cyst (note: small cysts may be missed on USG if not specifically looked for)
A careful menstrual history is mandatory.

7. Other Causes to Consider

CauseClue
Reactive gastritisNSAIDs, alcohol, iron ingestion
Acute/chronic pancreatitisPain radiating to back, raised amylase/lipase (rare in this age but possible)
Abdominal migraineEpisodic, family history of migraine
Celiac diseaseBloating, diarrhea, malabsorption
IBD (Crohn's)Weight loss, diarrhea, oral ulcers, perianal disease
Anxiety / somatic disorderAdolescent with stressors, no red flags

Recommended Workup

History (key questions):
  • Relation of pain to meals, timing, duration, character
  • Heartburn, regurgitation, nausea, vomiting
  • Bowel habits (constipation/diarrhea)
  • Menstrual history - cycle, last period, dysmenorrhea
  • NSAID/medication use
  • Weight loss, fatigue (red flag symptoms)
  • Family history of PUD, IBD, celiac
  • Psychosocial history - school stress, anxiety
Investigations:
  1. CBC - anemia (chronic blood loss or celiac/IBD)
  2. H. pylori stool antigen test or ¹³C-Urea Breath Test - non-invasive first-line
  3. LFTs, lipase/amylase - to exclude hepatobiliary/pancreatic cause
  4. ESR/CRP - if IBD suspected
  5. Anti-tTG IgA + serum IgA - to exclude celiac disease
  6. Upper GI endoscopy - if red flags present, or empirical treatment fails (confirms/excludes PUD, esophagitis, H. pylori, celiac)
  7. Pelvic exam / gynecology referral - if menstrual correlation

Red Flags (Warrant Urgent/Early Endoscopy)

  • Dysphagia or odynophagia
  • Unexplained weight loss
  • Recurrent vomiting
  • GI bleeding (hematemesis, melena)
  • Family history of GI malignancy
  • Anemia
  • Nocturnal awakening with pain
  • Failure to thrive

Initial Management (While Awaiting Results)

  1. Test for H. pylori non-invasively - if positive, treat with standard triple therapy (PPI + amoxicillin + clarithromycin x 14 days)
  2. Empirical PPI trial (omeprazole 20 mg OD x 4-8 weeks) - for likely GERD/gastritis/functional dyspepsia; response also has diagnostic value
  3. Lifestyle advice: avoid NSAIDs, spicy/fatty food, carbonated drinks; eat smaller meals; reduce stress
  4. Address psychosocial factors: school/social stressors, anxiety screening in adolescents
  5. Refer to gastroenterologist if no response to empirical therapy or red flags present
Bottom line: In a 14-year-old girl with epigastric pain and normal USG, functional dyspepsia and H. pylori gastritis are the top two diagnoses. A menstrual history is essential. Begin with non-invasive H. pylori testing and an empirical PPI trial, and escalate to upper endoscopy if red flags exist or there is no response to treatment.
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