Primary cutaneous T-cell lymphomas (CTCLs) encompass a clinically and biologically heterogeneous group of non-Hodgkin lymphomas (NHLs) defined by clonal proliferation of skin-homing malignant T lymphocytes and natural killer cells. They account for up to 75% to 80% of all cutaneous lymphomas. The current WHO-EORTC classification of cutaneous lymphomas with primary cutaneous manifestations lists...

Secondary lung infiltration by lymphomas occurs frequently. To our knowledge, however, no recent studies have attempted to discriminate histologic patterns of lung infiltration in the lymphoma subtypes. We retrospectively evaluated the frequency of lung infiltration and the respective infiltration patterns by lymphomas at autopsy, during an 11-year period. Lymphomas were classified according to...

background: lymphomas are a group of malignancies affecting b, t and nk cells. cox-2 enzyme is one of the known inflammatory factors which increase in the inflammation process. increase in cox-2 expression inhibits apoptosis and increases tumor cells invasion and angiogenesis. increase in the cox-2 gene expression is seen in a group of cancers .specific cox-2 inhibition also can be beneficial i...

The association between viruses and lymphomas has long been recognized; however, the pathophysiological phenomena behind this relationship are unclear, and have been the object of intense research. Although our understanding of such mechanisms is slowly improving, much is still left to learn. With the recent advances in cancer biology, a diversity of biological pathways and novel targets and ag...

Salivary gland enlargement, most commonly involving one or both parotid glands, is sometimes seen in association with HIV infection. Enlargement of the parotid gland may be due to diffuse infiltrative lymphocytosis syndrome; lymphoepithelial cysts; or malignant tumors, such as squamous cell carcinoma, Kaposi sarcoma, and Hodgkin and non-Hodgkin lymphomas.1,2 Non–HIV-related causes of parotid en...

Non-Hodgkin diffuse large B-cell lymphomas of the mastoid that extend from the nasopharynx are extremely rare in children. Moreover, in lymphoproliferative diseases, the presence of otoneurological signs prior to systemic disease involvement is rare. Here, we present a rare case of non-Hodgkin B-cell lymphoma invading the middle ear and mastoid in a 1-year-old boy that mimicked acute mastoiditi...

Non-Hodgkin diffuse large B-cell lymphomas of the mastoid that extend from the nasopharynx are extremely rare in children. Moreover, in lymphoproliferative diseases, the presence of otoneurological signs prior to systemic disease involvement is rare. Here, we present a rare case of non-Hodgkin B-cell lymphoma invading the middle ear and mastoid in a 1-year-old boy that mimicked acute mastoiditi...

Burkitt’s lymphomas or their variants (approximately 40% of non-Hodgkin lymphomas) seen in child age. Sporadic Burkitt’s lymphoma is most common involvement in the abdomen. Approximately 25%-30% of children are develop acute abdomen due to the right lower quadrant mass or ileo-cecal invagination. The initial presentation of disease occurs are abdominal pain, nausea, vomiting, gastrointestinal b...

Mature T-cell neoplasms are relatively uncommon, accounting for approximately 10% of all non-Hodgkin lymphomas. This category of hematopoietic neoplasms is clinically aggressive and shows a poor response to therapy and shortened survival. The antigen CD20 has long been thought to be a specific marker for B-cell lineage and has been used to help differentiate T-cell and B-cell neoplasms. We pres...

Peripheral T-cell lymphomas (PTCLs) are a heterogeneous group of non-Hodgkin lymphomas frequently associated with poor prognosis and for which genetic mechanisms of transformation remain incompletely understood. Using RNA sequencing and targeted sequencing, here we identify a recurrent in-frame deletion (VAV1 Δ778-786) generated by a focal deletion-driven alternative splicing mechanism as well ...