Spot Dx — What’s irritating this infant’s eye?

Noah is a seven-day-old infant who is brought in by his parents with a lump below his left eye. 

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<p>Noah is a seven-day-old infant who is brought in by his parents with a lump below his left eye. </p><p>Noah has an uncomplicated antenatal and birth history. He was born at 39+3 via vaginal delivery and has had no other neonatal issues. </p><p>His parents noted a very subtle blue discolouration and lump near his medial canthus on day two of life. The lump has progressively grown and became erythematous. He is otherwise well, breastfeeding and putting on weight with no systemic symptoms. </p><p>On examination Noah has purulent discharge from his eye and a fluctuant erythematous mass inferior to the medial canthus. Observations are within normal limits.</p>

Dr Lucy Rowlands is a GP in Perth.