Painless Gum Lump in Child: Persistent After Antibiotics - Next Steps

A painless gum lump persisting 4 weeks post-antibiotics in an 11-year-old warrants specialist evaluation.

Differential Diagnosis

• Periapical granuloma/cyst: Chronic apical periodontitis; may shrink with antibiotics but persists until source (necrotic pulp) treated (RCT or extraction).
• Eruption cyst/hematoma: Over erupting tooth; usually resolves spontaneously.
• Fibroma / peripheral ossifying fibroma: Reactive hyperplasia; firm, pink, sessile.
• Pyogenic granuloma: Vascular, bleeds easily; often pregnancy/trauma related.
• Odontogenic tumors (rare): Ameloblastoma, odontoma.
• Salivary gland lesion / minor salivary duct cyst.

Recommended Pathway

1. Pediatric dentist / oral surgeon referral.
2. Imaging: Panorex + periapical ± CBCT for 3D anatomy.
3. Vitality testing of adjacent teeth.
4. Excisional biopsy if diagnosis uncertain or lesion persists >2 wks post-antibiotics.

Red Flags for Urgency

• Rapid growth, fixation, ulceration, bleeding, paresthesia, tooth mobility/displacement.

Antibiotics alone cannot resolve a non-vital tooth source. Definitive treatment (RCT/extraction) or excision with histology is needed.