What should you know about lymphocyte rich thymoma?

The thymus sits behind the breastbone and is involved in immune-system development. In lymphocyte-rich thymoma, the tumour sample has a prominent population of lymphocytes. Pathologists use the appearance of the tumour cells, their marker pattern, and the surrounding tissue to distinguish this type from other thymic tumours and from lymphoma.

Some thymomas are found on imaging before they cause symptoms. Others may cause chest discomfort, cough, breathlessness, or pressure on nearby structures. Thymoma can also occur alongside immune-related conditions, including weakness that fluctuates with activity. These symptoms are not specific, so they need assessment rather than self-diagnosis.

Your team will review the pathology report, scans, symptoms, and whether the tumour can be removed safely. When appropriate, [Tumour Removal Surgery](/treatments/surgical-oncology/tumour-removal-surgery/) may remove the thymus and tumour. [Radiotherapy](/treatments/radiation-oncology/radiotherapy/) may be considered when local control needs extra treatment or when surgery cannot remove all visible disease.

Ask for the exact stage and pathology wording, because the treatment plan depends on invasion, spread, margins, and your general health. Tell the team about muscle weakness, swallowing difficulty, double vision, or breathing changes, as these may affect anaesthesia and supportive care.

Seek urgent help for new or worsening difficulty breathing, inability to swallow saliva, sudden severe weakness, fainting, or chest pain. Contact your oncology team about fever, increasing wound redness, drainage, or worsening symptoms after a procedure or treatment.

Ask: What confirms the lymphocyte-rich subtype? Has the tumour invaded nearby structures? Is surgery feasible? Could radiotherapy help? Do I need assessment for associated immune conditions before treatment?