Reversible pituitary hyperplasia at birth in a macrosomic full-term baby boy

Area of Science:

• Pediatric endocrinology
• Neuroimaging
• Developmental biology

Background:

• Pituitary hyperplasia is commonly associated with conditions like primary hypothyroidism, pregnancy, puberty, or tumors that secrete releasing hormones.
• These conditions often lead to abnormal pituitary gland growth due to underlying physiological or pathological processes.

Observation:

• A full-term neonate presented with an enlarged pituitary gland (8 mm height) at 3 days of age.
• This finding was noted despite a normal endocrinological evaluation, indicating no apparent hormonal dysfunction.
• Follow-up imaging at 5 months showed a normalized pituitary gland size.

Findings:

• This case represents a potential instance of transient pituitary hyperplasia in a neonate with normal pituitary function.
• The observed pituitary enlargement resolved spontaneously without intervention.
• This contrasts with typical presentations of pituitary hyperplasia linked to specific medical conditions.

Implications:

• This case expands the understanding of pituitary gland development and potential variations in neonates.
• It suggests that transient pituitary enlargement can occur in healthy infants, warranting further investigation.
• Further research is needed to elucidate the mechanisms and clinical significance of such findings in neonatal pituitary imaging.