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Although neonatal tumors are rare, neuroblastoma is the most common neoplasia among them. These tumors, which usually involve children in early infancy, are derived from neural crest cells of adrenal gland medulla or sympathetic ganglia. Even though congenital metastatic neuroblastoma presents a favorable prognosis, it may lead to death if not recognized and treated early on. The authors report the case of a 2-month-old child who was born from in vitro fertilization, and whose diagnosis was made after birth. The form of presentation of this case as a metastatic disease concerning this age group is noteworthy., Competing Interests: Conflict of interest: None.

First described by Dr. Benjamin Castleman in 1956, Castleman disease is an uncommon disease of an etiology that is not yet thoroughly known. Three distinct histological subtypes have already been described: hyaline-vascular-, plasma cell-, and human herpes virus 8-associated variant, clinically distinguished in multi or unicentric types. Castleman disease is occasionally diagnosed in children, but more often in young adults, with no gender predominance. The symptoms are rather heterogeneous, varying from an asymptomatic mass in the unicentric Castleman disease type, to life-threatening systemic inflammatory state with systemic symptoms in the multicentric Castleman disease type. The authors report a case of a 15-year-old boy who sought medical attention due to a cervical tumor mass, without systemic symptoms. Pathology exam of the excised mass diagnosed a very typical example of the hyaline-vascular unicentric type of Castleman disease., Competing Interests: Conflict of interest: None