Anaplstc lg cell lymph, ALK-pos, nodes of head, face, and nk

This code signifies a specific type of non-Hodgkin lymphoma characterized by the presence of the anaplastic lymphoma kinase (ALK) protein, affecting the lymph nodes located in the head, face, and neck regions. It represents a malignant proliferation of T-cells with distinct anaplastic features.

Use this code when documentation confirms a diagnosis of ALK-positive anaplastic large cell lymphoma specifically involving lymph nodes in the head, face, or neck. This diagnosis is typically established through biopsy and immunohistochemical staining for ALK.

• Ensure the pathology report explicitly states "ALK-positive" for anaplastic large cell lymphoma.
• Verify that the anatomical site is clearly documented as lymph nodes of the head, face, or neck.
• Do not confuse with ALK-negative anaplastic large cell lymphoma or other types of non-Hodgkin lymphoma.