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Deep juvenile xanthogranuloma: an unusual presentation
U Neveling1, L B Kahn, E Valderrama
1Department of Pathology, Long Island Jewish Medical Center, New Hyde Park, NY 11040, USA.
Summary
Juvenile xanthogranuloma (JXG) can occur deep within the body without skin lesions. This case highlights key diagnostic markers differentiating JXG from Langerhans cell histiocytosis (LCH) in children.
Area of Science:
- Pediatric Pathology
- Dermatopathology
- Histiocytic Disorders
Background:
- Juvenile xanthogranuloma (JXG) is a benign histiocytic proliferation typically presenting with skin lesions in infants and children.
- Deep-seated JXG, particularly in the omentum and peritoneum, can mimic other childhood histiocytosis syndromes, posing diagnostic challenges.
- Accurate differentiation from Langerhans cell histiocytosis (LCH) is crucial due to differing prognoses and management strategies.
Observation:
- A 27-month-old girl presented with ascites and multiple omental and peritoneal nodules.
- Clinical suspicion leaned towards Langerhans cell histiocytosis (LCH).
- Histopathological examination revealed absence of Birbeck granules, S-100 protein, and T6 antigen, but positivity for CD68 and factor XIIIa.
Findings:
- The immunohistochemical profile (CD68+, factor XIIIa+, S-100-, T6-) confirmed Juvenile Xanthogranuloma (JXG).
- This case underscores the diagnostic utility of specific immunohistochemical markers in distinguishing JXG from LCH in deep-seated presentations.
- The absence of characteristic LCH markers (Birbeck granules, S-100, T6) was key to the diagnosis.
Implications:
- Physicians must consider Juvenile Xanthogranuloma (JXG) in the differential diagnosis of pediatric abdominal masses, even without cutaneous involvement.
- Immunohistochemistry plays a vital role in differentiating deep JXG from Langerhans cell histiocytosis (LCH).
- Recognizing the expanded spectrum of JXG manifestations is essential for appropriate patient management and avoiding misdiagnosis.