Mantle Cell Lymphoma Presenting as a Subcutaneous Mass of the Right Leg.

Mantle cell lymphoma (MCL) is a relatively rare B-cell non-Hodgkin lymphoma, typically presenting with extensive lymphadenopathy, bone marrow involvement, and splenomegaly. Extranodal sites can also be involved. We discuss a 73-year-old man whose MCL presented with a 6-month history of a subdermal mass of the right upper thigh and no systemic symptoms.

ABC-type diffuse large B-cell lymphoma presenting as rotator cuff tendinopathy: A diagnostic dilemma and review of the literature.

Diffuse large B-cell lymphoma often presents with extranodal manifestations involving the musculoskeletal system. Shoulder pain is particularly worrisome for malignancy. Individuals presenting with refractory upper extremity complaints should undergo a prompt and thorough evaluation for cancer, as a delay in diagnosis can result in an unfavorable outcome.

Renal Tubular Mitochondrial Abnormalities in Complex II/III Respiratory Chain Deficiency.

Defects in the respiratory chain may present with a wide spectrum of clinical signs and symptoms. In this "Images in Pathology" discussion we correlate the clinical, histologic, and ultrastructural findings in a 12-year-old male with a complex II/III respiratory chain deficiency and kidney dysfunction.

Pathology image of the month: death in a young adult with sickle cell disease.

A 27-year-old African-American female with known sickle cell disease was admitted for sickle cell crisis and presumed sepsis. The patient's past medical history was complicated by multiple sickle cell-related complications, including seizures and multiple prior blood transfusions. Her hospital course included Staphylococcus epidermidis bacteremia, for which broad spectrum antibiotics were prescribed. On hospital day nine, the patient was found unresponsive and declared dead after unsuccessful efforts at resuscitation. An unlimited autopsy examination was conducted under authorization of the coroner. Findings included numerous pathologic features ascribed to sickle cell disease, including systemic siderosis and splenic atrophy [weight 10 gm (140±78)], fibrosis, and Gamna Gandy nodules. Additional autopsy findings included cardiomegaly with a heart weight of 450 gm (312±78), right atrial and right ventricular chamber dilatation, and hepatomegaly with a liver weight of 2650 gm (1475±362). The image below demonstrates microscopic examination of the lung parenchyma.