Peter van Heerde

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A tumor in a 37 years old male is described in which the tumor cells appeared to be derived from interdigitating cells normally found in the T-cell area of lymph nodes. The patient presented with superior vena caval obstruction due to a mediastinal mass, followed by lymph node enlargement and skin lesions leading to death within 4 months. The tumor cells(More)
A cytomorphological analysis using a large number of variables was applied to 136 fine needle aspirations and 122 imprints from 258 biopsy proven lymphoid lesions, including 203 non-Hodgkin's lymphomas (NHL), 12 true histiocytic neoplasms and 43 lymphoid hyperplasias. Characteristics of the various cell types are described using the Kiel classification(More)
SummaryIn the REAL classification the diffuse large B-cell non-Hodgkin lymphomas (NHL) are grouped together, because subclassifications are considered to lack both reproducibility and clinical significance. Others, however, claim that patients with an immunoblastic NHL have a worse prognosis than patients with other types of diffuse large B-cell NHL.(More)
Space-filling lesions in the orbit can be divided into 3 large groups: 1. Acute and subacute inflammatory processes (bacterial, fungal, parasitic, foreign body). 2. Benign and malignant tumours, true new growths. 3. Pseudo-tumours. The conditions in group 3 are also space-filling lesions, but have the characteristics of a chronic, infiltrating, inflammatory(More)
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