In Japan, EBV positive rate in immunocompetent patients with nodal lymphomas is less than 10% in B-cell and 20-50% in T cell lymphoma. Among extranodal lymphomas, EBV positive rate is higher in pyothorax-associated lymphoma (PAL), nasal NK/T-cell lymphoma, and adrenal lymphoma. PAL is non-Hodgkin's lymphoma that develops from chronic pyothorax resulted from artificial pneumothorax for the treat...

Cutaneous T-cell lymphoma describes a heterogeneous group of neoplasms of skin homing T cells that vary considerably in clinical presentation, histologic appearance, immunophenotype, and prognosis. This paper addresses the cutaneous T-cell lymphoma in Asians with respect to clinical-epidemiologic and histopathological features. Compared with Western countries, Asia usually has higher rates of c...

Extranodal NK/T-cell lymphoma is a rare subtype of extranodal large cell lymphoma that typically involves the nasal cavity, nasopharynx, and the upper aerodigestive tract where as non-nasal NK-cell lymphoma involves any other locations of the body. Extranodal NK/T-cell lymphoma is exceeding rare in Western Countries, with most documented cases occurring in Asia. The disease often involves the s...

Primary pulmonary non-Hodgkin's lymphoma (NHL) is very rare. It represents less than 1% of all NHL, and 0.5-1% of all primary pulmonary malignancies. Almost all cases of primary pulmonary NHL originate from B-cell lineage. We present a case of a 53-year-old man with primary extranodal NK/T-cell lymphoma of the bronchus and lung, presented progressive dyspnea caused by right lower lung consolida...

BACKGROUND Primary cutaneous T-cell lymphomas constitute a heterogeneous and rare group of diseases with regional particularities in Latin America. OBJECTIVE To determine the clinicopathological features, relative frequency and survival among patients from a Peruvian institution. METHODS Primary cutaneous T-cell lymphomas were defined based on the absence of extracutaneous disease at diagno...