Primary testicular presentation of ALK-1-negative anaplastic large cell lymphoma in a pediatric patient.

Anaplastic large cell lymphoma is a heterogeneous group of malignant non-Hodgkin lymphomas that occurs in up to 15% of all pediatric non-Hodgkin lymphomas. It is characterized by B-symptoms and involvement of extranodal sites such as skin, bone, and soft tissue. This brief report describes first reported case of pediatric primary testicular anaplastic large cell lymphoma in a 14-year-old boy. The presentation included acute testicular pain, fever, and vomiting. After chemotherapy and unilateral radical orchiectomy, patient continues in complete remission.