Kikuchi's disease in Asian children

Abstract

Objective: Kikuchi's disease (KD), or histiocytic necrotizing lymphadenitis, is a unique form of self-limiting lymphadenitis and typically affects the head and neck regions. It usually occurs in young adults and has a female predilection. The aim of this study was to review the authors' institutional experience with KD in children over a 16-year period.

Methods: Between January 1986 and May 2002, a total of 23 patients who were younger than 16 years underwent cervical lymph node biopsies and received a diagnosis of KD. Clinical features, laboratory values, pathologic parameters, specific characteristics of our pediatric patients, and long-term follow-up results are discussed. The follow-up period averaged 8 years.

Results: There were 8 girls and 15 boys with a mean age of 12.8. All 23 patients had affected cervical lymph nodes located in the posterior cervical triangle, and 2 cases additionally had affected nodes in the anterior triangle. Cervical lymph nodes were affected unilaterally in 82.6% (19) and bilaterally in 17.4% (4) of these patients. The dimensions of the affected lymph nodes were commonly in the range of 0.5 to 3 cm (52.2%; 12 of 23) and 3 to 6 cm (39.1%; 9 of 23). In 2 (8.7%) patients, the size of the enlarged lymph nodes reached >6 cm. Leukopenia was observed in 5 (21.7%) patients, and fever was observed in 7 (30.4%) patients. One child with KD developed systemic lupus erythematosus 5 years later. The cervical lymphadenopathy usually resolved itself without any medical treatment within 6 months after definite diagnosis was made. Neither recurrence nor persisting KD has since been noted.

Conclusion: KD, although rare, should be part of the differential diagnosis for posterior cervical lymphadenopathy in children, especially in patients of Asian descent. In our pediatric series, KD demonstrated a male predominance, which is in contrast to previously reported adult series demonstrating a female predominance. The children with KD require a systemic survey and regular follow-up for several years to rule out the development of systemic lupus erythematosus.