Primary cutaneous lymphoma (CL) is a malignant lymphoma presenting in the skin. Primary CL is rare in children and difficult to clinically diagnose. We report four pediatric cases of primary CL with tumors in different body area: case 1, on the face and left thigh; case 2, on the left side of the neck; case 3, on the left side of the back; and case 4, on the left buttock. The first diagnoses of these children were rash, abscess, lymphadenitis, and fever, respectively in local hospitals. All 4 patients were diagnosed as primary CL by histopathologic examination in our hospital. Three patients (case 1, case 2 and case 4) were treated with chemotherapy. The size of tumor and degree of cutaneous lesion were alleviated after chemotherapy. Case 3 refused to receive chemotherapy, and died. The cases indicated the importance of early diagnosis of primary CL to guide appropriate therapy.

Keywords: biopsy, chemotherapy, pediatric, primary cutaneous lymphoma