Radiologic Evaluation of Subcutaneous Fat Necrosis Complicated by an Abscess in a Newborn: A Case Report.

Subcutaneous fat necrosis of the newborn (SCFN) is a condition that may affect neonates within the first weeks of life. SCFN lesions often present as firm, well-defined nodules or plaques under the skin, accompanied by redness or discoloration. These lesions typically present on areas such as the trunk, limbs, or cheeks. SCFN generally resolves on its own but may be associated with metabolic or hematologic complications. This report describes the sonographic findings in a unique case of a seven-day-old female neonate with SCFN complicated by both hypercalcemia and a subcutaneous abscess. The report highlights the importance of considering infection in atypical presentations of SCFN and the utility of ultrasound imaging in characterizing the lesion.