Mycosis fungoides, intrathoracic lymph nodes

This code signifies a diagnosis of mycosis fungoides, a type of cutaneous T-cell lymphoma, specifically when it has spread to or originated in the lymph nodes located within the chest cavity. This represents an advanced stage of the disease, indicating systemic involvement beyond the skin.

Use this code when documentation confirms mycosis fungoides affecting the intrathoracic lymph nodes, typically identified through imaging (e.g., CT scan, PET scan) and/or biopsy. This code is appropriate for patients with confirmed intrathoracic lymphadenopathy due to mycosis fungoides.

• Ensure documentation clearly specifies "intrathoracic lymph nodes" and not just generalized lymphadenopathy.
• Code any associated skin manifestations of mycosis fungoides separately, if still present and clinically relevant.
• Consider sequencing this code after any codes for the primary cutaneous mycosis fungoides, if applicable, to reflect the progression.