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Lymphadenopathy in a series of Egyptian pediatric patients and the role of pathology in the diagnostic workup.
Pediatric and Developmental Pathology 2014 September
Assessment of lymphadenopathy in children represents a diagnostic challenge because of the extensive differential diagnoses, including reactive and malignant conditions. Knowledge of the etiologic pattern of lymphadenopathy in a given geographical region is essential for making a confident diagnosis or for suspecting a disease. Hence, the present study was carried out to identify different etiologies of lymphadenopathy in children in our region and to assess parameters commonly associated with malignancy, with an emphasis on the role of pathology. One hundred and twenty patients aged 1 month to 18 years were included in the study. They were sorted into neoplastic and nonneoplastic (infectious and noninfectious) groups. In 56 patients, biopsy (fine needle aspiration cytology [FNAC], core needle, or excision biopsy) was essential to reach the final diagnosis. Sensitivity of FNAC in the differentiation between neoplastic and nonneoplastic lymphadenopathy was 92.3%, and specificity was 90.0%, with a diagnostic accuracy of 91.3%. We concluded that malignancy should be suspected in the following conditions: presence of abdominal or multiple symptoms; symptom duration of 1-6 months; generalized lymphadenopathy; multiple groups of lymph node (LN) involved; LN size > 2 cm; amalgamated, hard, fixed, and nontender LNs; certain abnormal complete blood count findings; blast cells in blood film; and elevated lactate dehydrogenase level. In such cases, LN biopsy is highly recommended. A final diagnosis was achieved after integrating information from history and clinical findings with the laboratory, radiological, pathological, and microbiological findings. Accordingly, an algorithm for primary diagnostic evaluation of children with lymphadenopathy is suggested.
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