388 Sociedad Chilena de Pediatría Rev Chil Pediatr. 2017;88(3):388-392 DOI: 10.4067/S0370-41062017000300012 CLINICAL CASE Giant splenic cyst in a teenager girl. Case report Quiste esplénico gigante en una adolescente. Caso clínico Beatriz Martínez Torres a , Manuel Medina García b , Miguel Ángel Zafra Anta c , Alejandro José García Muñoz-Najar d , Juan C. Tardío Dovao e a General Surgery resident b Surgeon Senior doctor. c Paediatric senior doctor. d Chief of the Hospital’s Pathological Anatomy Service. University Hospital Fuenlabrada. Madrid. España Received: 15-5-2016; Accepted: 19-11-2016 Keywords: Splenic cyst; non-parasite cyst; splenectomy. Abstract Giant nonparasitic splenic epidermoid cysts are relatively uncommon. These lesions can lead abdo- minal pain, but most of them are asymptomatic, and they are discovered incidentally. We report a 13-y old female with a giant splenic epidermoid cystic, given the special interest of diagnostic and therapeutic decision-making of this rare entity. Case report: A 13-y old female with clinical his- tory of abdominal pain since the last two months. On physical examination a firm, hemotender mass was palpable in left hypochondrium. Diagnosis of a large cystic splenic mass was made based on ultrasound and abdominal computed tomography scan. Splenectomy was performed, and histo- pathological- immunohistochemistry studies revealed findings suggestive of primary epithelial cyst. The post-operative clinical course was satisfactory and uneventful. Conclusions: Treatment of giant nonparasitic splenic cysts is surgical. Preserve splenic parenchyma must be the aim in an individuali- zed decision-making. The different types of surgical modalities will be according to the diagnosis and clinical situation (cyst size, age, comorbidities). Correspondence: Miguel Ángel Zafra Anta miguelzafraanta@gmail.com miguel.zafra@salud.madrid.org Introduction Giant and non-parasitic solitary splenic cysts are in- frequent. They are incidentally diagnosed in infancy or in young people younger than 20 years old. The case can ran- ge from painless abdominal mass to abdominal pain, dis- comfort or sensation of fullness in the upper left quadrant due to splenomegaly and the pressure exerted by the cyst on adjacent structures, even left omalgia and arterial hyperten- sion can be found in case of compression of the kidney 1,2 . If the lesion is diffuse and compromises the entire spleen (e.g. tumor), the phenomenon of splenic sequestration and hypersplenism may occur with pancytopenia 3 . Different classifications of non-parasitic cysts according