Clinical Characteristics of and Cancer Incidence in Children Evaluated for Lymphadenoapthy Referred to Pediatric Oncology Clinics.

OBJECTIVES: In our study, we aimed to investigate the clinical characteristics and cancer frequency in patients referred to our pediatric oncology outpatient clinic for lymphadenopathy. METHODS: The charts of patients admitted to our pediatric oncology outpatient clinics for lymphadenopathy between January 2014, and December 2016 were retrospectively reviewed in this study. Age, gender, duration of complaints, previous therapies, systemic signs and symptoms, lymph node characteristics and laboratory findings were recorded. The frequency of malignancy was calculated. RESULTS: One hundred thirty-four patients (34 girls) with a median age of six years (range four months-17 years) were included in our study. The majority of the patients (98%) had localized lymphadenopathy and the head and neck region was the most common site of involvement (87%). The median long-axis diameter of lymph nodes ranged between 0.5 cm and 5 cm (median 2 cm) by physical examination. Twenty-one patients (15.6%) had lymph node biopsy. Four patients had ruptured epidermal cyst, lymphangioma, pilomatricoma and ectopic thymus. Of the other biopsies, nine patients were diagnosed with reactive LAP, four with lymphadenitis, and four with Hodgkin's disease. The lymphoma patients had lymph node size greater than 2.5 cm and the duration of lymphadenopathy was longer than four weeks. Three out of four patients had systemic clinical findings accompanying lymph node enlargement. CONCLUSION: Three percent of the patients with lymphadenopathy who were referred for suspected malignancy received a cancer diagnosis. This rate, which is too low for a reference center, suggested that the patients might be referred to the pediatric oncology outpatient clinic without a thorough evaluation in primary health care.