Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Hodgkins lymphoma (nodular sclerosing type)
- Radiologic Findings
- A 14 years old boy presented with cough and orthopnea. At that time, CT scan showed heterogenous enhancing soft tissue mass with encasement of both main bronchi and invasion of the left chest wall in the anterior mediastinum. When the excisional biopsy was done at the left chest wall, the pathologic diagnosis was fibrosing mediastinitis without any malignant cells. After low dose steroid therapy, the mediastinal mass size has been reduced.
As time goes by, both neck swelling was newly developed. Five months later the CT scan shows heterogenous enhancing mass in both supraclavicular spaces as well as the anterior mediastinum. The neck mass displaced the carotid arteries and jugular veins. The excisional biopsy of the neck mass was performed for the definitive diagnosis.
After 5 months
After 5 months
After 5 months
Larger pleomorphic tumor cells (white arrow) with prominent nucleoli was seen in H&E stain. These tumor cells composed o
The tumor cells demonstrated strong positive immunoreaction for CD4 and CD30(Ki-1) showing cell surface staining.
- Brief Review
- ALCL is a distinct from of NHL that affects children and young adults predominantly. It was described first by Stein et al in 1985 when it was noted that a subset of malignant lymphomas expressed CD30 (Ki-1 antigen). Morphologically, these CD30+ lymphomas are composed of large cells with bizarre nuclei often co-expressing T-cell antigens. Prior to the recognition of CD30 staining, ALCL was classified in a variety of ways. ALCL is a T-cell NHL with a unique morphology, immunohistochemical staining pattern, cytogenetic abnormalities, and pathobiology. The unique genetic feature of ALCL is translocation involving the ALK gene located on chromosome 2p23.
ALCL is relatively uncommon, accounting for 3% of all NHLs. Systemic ALCL is predominantly a disease of childhood and adolescence, and represents 10%-15% of all childhood NHLs and 30%-40% of large cell lympomas in the pediatric population. ALCL is most common in the first three decades of life, with a marked male predominance, especially in younger patients.
Systemic ALCL presents with advanced stage (stages III-IV) disease in 65%-75% of patients. Nodal involvement is observed in 90% of systemic ALCL patients, with 40% having exclusive nodal involvement. ALCL can present with a locally invasive mediastinal mass, although less commonly than in HL. Adverse clinical prognostic factors include mediastinal involvement, visceral involvement, elevated LDH levels, and high-intermediate/high IPI scores. Relapse occur in 20%-40% of patients and can be treated effectively with salvage chemotherapy and stem cell transplant.
Note.
At first, we couldn’t extract entire mediastinal mass, we could provisionally conclude that the diagnosis of his mediastinal mass was fibrosing mediastinitis based on the excisional biopsy result of the anterior chest wall mass and the reduction of the mass with low dose steroid therapy. Therefore, initially we thought that this case is valuable for report because fibrosing mediastinitis should be added for the differential diagnosis of the anterior mediastinal mass in adolescent. During follow-up, the neck mass was newly developed, the biopsy result of the neck mass was Hodgkins lymphoma nodular sclerosing type. However, though the final diagnosis was changed to lymphoma, we could get the value from this case as follow; when the pathologic finding of the anterior mediastinal mass by partially resected or percutaneous needle biopsy is negative for malignancy, we must suggest that the lesion may be malignancy through the imaging findings.
# Correct diagnosis : Hodgkins Lymphoma
# Differential diagnosis
-- NHL
-- Germ cell tumor
-- Fibrosing mediastinitis
- References
- 1. CT evaluation of the anterior mediastinum: spectrum of disease. Radiographics. 1994 Sep;14(5):973-90.
Lymphoma in adolescents and young adults. Semin Oncol. 2009 Oct;36(5):381-418.
- Keywords
- Mediastinum, Lymphproliferative disorder, Lymphoma,