Plasmablastic lymphoma of the maxillary sinus in an HIV-negative patient: a case report and literature review.

Plasmablastic lymphoma (PBL) is a rare and aggressive variant of diffuse large B cell lymphoma. The prognosis of PBL patients is poor. The majority of patients succumb to a fulminant disease course, with most dying in the first year after diagnosis.

Erythroblastic sarcoma, an extremely rare variant of myeloid sarcoma.

A 79-year-old man was admitted to the hospital because of a 20-lb weight loss, low back pain, and leg weakness. He had a 1-year history of fibrotic myelodysplasia, possibly therapy related, with a highly complex chromosome karyotype. Radiologic evaluation showed extensive destructive bone lesions, retroperitoneal lymphadenopathy, and evidence for thoracic spinal cord compression.

Prognostic markers and long-term outcomes in ductal carcinoma in situ of the breast treated with excision alone.

Background: Increased use of breast cancer screening has led to an increase in the number of diagnosed cases of ductal carcinoma in situ (DCIS). However, there is no definite way to predict progression or recurrence of DCIS. We analyzed the significance of biological markers and tumor characteristics in predicting recurrence in a large series of DCIS patients with long-term follow-up treated with breast conservation surgery (BCS) alone.

Molecular grading of ductal carcinoma in situ of the breast.

Purpose: Increased incidence of ductal carcinoma in situ (DCIS) associated with mammographic screening for breast cancer has emphasized the challenges of managing this condition. The aim of this study was to identify informative clinical indicators of DCIS biology by molecular profiling.

Experimental Design: Areas of in situ carcinoma, atypical ductal hyperplasia, and benign epithelium were microdissected from 46 invasive breast cancers.

Flow cytometric quantitation of natural killer cells and T lymphocytes expressing T-cell receptors alpha/beta and gamma/delta is not helpful in distinguishing benign from malignant body cavity effusions.

Background: Quantitation of natural killer (NK) cells in benign and malignant effusions has yielded conflicting results in the past. Studies have claimed higher, lower, and essentially equal percentages of NK cells for benign and malignant effusions. In addition, virtually no literature exists on the numbers and distribution of T lymphocytes expressing T-cell receptor alpha/beta (TCR alpha/beta) and T-cell receptor gamma/delta (TCR gamma/delta) in body effusions.

Large natural killer cell lymphoma arising from an indolent natural killer cell large granular lymphocyte proliferation.

Natural killer cell large granular lymphocyte proliferation is a relatively rare disorder that typically runs a chronic, indolent course. We present a patient with a 3 1/2-year history of natural killer cell large granular lymphocyte proliferation terminating in large cell lymphoma with natural killer cell features. The diagnosis of natural killer cell large granular lymphocyte proliferation was based on flow cytometric demonstration of an expanded population of CD3- CD16+/CD56+ lymphocytes in the peripheral blood.

The prognostic significance of multiple morphologic features and biologic markers in ductal carcinoma in situ of the breast: a study of a large cohort of patients treated with surgery alone.

Background: A number of conventional histopathologic features have been associated with recurrence of ductal carcinoma in situ (DCIS) after surgery alone and are included in the Van Nuys Pathologic Classification and Prognostic Index. To the authors' knowledge, very little is known regarding the prognostic significance of the many biologic markers that have been studied in DCIS in the past decade.

Methods: Clinical and pathologic data were analyzed from 151 patients who underwent wide local excision alone for DCIS that was diagnosed by mammography or as an incidental finding between 1982 and 2000.

Unusually indolent T-cell prolymphocytic leukemia associated with a complex karyotype: is this T-cell chronic lymphocytic leukemia?

T-cell prolymphocytic leukemia (T-PLL) is typically associated with an aggressive clinical course, with a median survival of less than 1 year. We report a case of T-PLL that displays multiple cytogenetic abnormalities, with the most complex subclone having the following karyotype: 47, Y, -X, +8, inv (10) (p12q26), del (11) (p13p15) +marker. However, despite this genetic complexity, the leukemia has behaved in a remarkably indolent manner, with the patient remaining asymptomatic, without therapeutic intervention, for more than 7 years.

Natural killer-like T-cell lymphoma of the parotid in a patient infected with human immunodeficiency virus.

A 42-year-old man with acquired immunodeficiency syndrome developed a mass of the right parotid gland and multiple hepatic masses. Hematoxylin-eosin-stained sections of the parotid lesion showed a diffuse infiltrate of large mononuclear cells with vesicular nuclei and prominent nucleoli, consistent with a non-Hodgkin lymphoma. Immunohistochemical stains demonstrated expression of the T-cell markers CD3 and UCHL-1, as well as latent membrane protein 1 and T-cell intracellular antigen 1.