Small cell B-cell lymphoma, intrathoracic lymph nodes

This code signifies a malignant lymphoma originating from small B-lymphocytes, specifically located within the intrathoracic lymph nodes. This type of non-Hodgkin lymphoma is characterized by its cellular morphology and anatomical site of involvement.

Apply this code when documentation confirms a diagnosis of small cell B-cell lymphoma affecting lymph nodes within the chest cavity, such as mediastinal, hilar, or tracheobronchial nodes. This diagnosis is typically established through biopsy and histopathological examination.

• Ensure the pathology report explicitly states "small cell B-cell lymphoma" and specifies intrathoracic lymph node involvement.
• Do not confuse with other B-cell lymphoma subtypes or lymphomas affecting extrathoracic sites.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any associated signs, symptoms, or complications.