BACKGROUND: Pediatric germ cell @entity5 account for approximately 3.5 % of all childhood @entity5 for @entity1 under the age of 15 years. Up to one-third are extragonadal neoplasms. @entity2971 are a heterogeneous group of @entity5 with a wide variety of histopathological features. @entity2970 is the predominant variant in newborns and younger @entity1 . We report for the first time, the presentation of a primary yolk sac @entity5 in the abdominal wall of a small @entity1 . CASE PRESENTATION: An 18-month-old white @entity1 underwent resection of a small, round subcutaneous lump (1.5*1.3*0.8 cm) of the abdominal wall in her right hypochondriac region. The histopathology was compatible with yolk sac @entity5 . Her @entity160 was initially elevated but normalized after the resection. Magnetic resonance imaging of her abdomen was normal. The surgeon decided to observe and follow her @entity160 level closely. One year after resection a local recurrence appeared and her @entity160 rose to 58 ng/mL. The surgeon performed a wide resection of the lesion with normalization of her @entity160 . Follow-up consisted of measuring @entity160 , clinical evaluation, and abdominal ultrasound. CONCLUSIONS: Clinicians should be aware that a yolk sac @entity5 can present in an unusual extragonadal place, for example in this case it was subcutaneous. In some cases, conservative treatment can be carried out with careful monitoring of the @entity1 and their @entity160 .

@entity2970 in the abdominal wall of an 18-month-old XXXX : a case report.

@entity1 :: ('9606', 'Species') :: ['children', 'girl', 'patient', 'child'] @entity2971 :: ('MESH:D009373', 'Disease') :: ['Germ cell tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'malignant tumors', 'cancers', 'tumors'] @entity2970 :: ('MESH:D018240', 'Disease') :: ['Yolk sac tumor'] @entity160 :: ('174', 'Gene') :: ['alpha-fetoprotein']
@entity1 :: (9606,Species) :: ['girl']
