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At the time the article was created Jessica Van Den Heuvel had no recorded disclosures.View Jessica Van Den Heuvel's current disclosures
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Neonatal mastitis is rare and refers to infection of the breast tissue occurring in a neonate.
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Patients may present with unilateral breast erythema and pain sometimes with associated nipple discharge and lymphadenopathy. It usually occurs in patients under five weeks of age, with a peak incidence around three weeks of age. Systemic symptoms, such as fever, are not always present.
Neonatal breast hypertrophy is common in newborns, which is thought to be from declining levels of maternal estrogen triggering neonatal prolactin secretion. Superinfection of this breast tissue results in mastitis.
The most common causative organisms are Staphylococcus aureus (83-88% of cases), Escheria coli, Salmonella spp., anaerobes and Group B streptococcus.
poorly defined hyperechoic breast tissue with hyperemia with surrounding hypervascular, hyperechoic subcutaneous fat
abscesses may appear as avascular hyperechoic or anechoic areas with surrounding hyperemia
Treatment and prognosis
Oral or parenteral antibiotic therapy is usually required.
breast abscess formation is the main complication from neonatal mastitis; incision and drainage may be necessary in these complicated cases
- 1. Masoodi T, Mufti GN, Bhat JI, Lone R, Arshi S, Ahmad SK. Neonatal mastitis: a clinico-microbiological study. (2014) Journal of neonatal surgery. 3 (1): 2. Pubmed
- 2. Raveenthiran V. Neonatal mastauxe (breast enlargement of the newborn). (2013) Journal of neonatal surgery. 2 (3): 31. Pubmed
- 3. Jawahar A, Vade A. Sonographic features of physiologic neonatal breast enlargement. (2014) Journal of clinical neonatology. 3 (2): 106-8. doi:10.4103/2249-4847.134701 - Pubmed
- 4. Borders H, Mychaliska G, Gebarski KS. Sonographic features of neonatal mastitis and breast abscess. (2009) Pediatric radiology. 39 (9): 955-8. doi:10.1007/s00247-009-1310-x - Pubmed
- 5. Sloan B, Evans R. Clinical pearls: neonatal breast mass. (2003) Academic emergency medicine : official journal of the Society for Academic Emergency Medicine. 10 (3): 269-70. Pubmed