Successful Management of Primary Mediastinal Large B-cell Lymphoma during Pregnancy.

We experienced a pregnant woman with superior vena cava syndrome at 15 weeks of pregnancy who was diagnosed with primary mediastinal large B-cell lymphoma and given chemotherapy. In this case, the clinical courses of both the mother and infant were favorable without any serious complications because of close multidisciplinary cooperation. Based on a retrospective review of this case, the administration of CHOP-like regimens during the second and third trimesters appears relatively safe.

Cutaneous Mycobacterium chelonae infection following autologous peripheral blood stem cell transplantation for POEMS syndrome.

Although hematopoietic stem cell transplantation (HSCT) may increase the curability of refractory hematologic diseases, it requires complication management due to a long-term immunocompromised state. We experienced a case who received an autologous peripheral blood stem cell transplantation (Auto-PBSCT) for POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes) and developed cutaneous Mycobacterium chelonae infection. It is clear that attention needs to be paid to prevent bacterial, fungal and viral infection after HSCT.

Vanishing Parotid Tumors on MR Imaging.

Background: Of all parotid gland tumors, only oncocytoma has been reported to appear isointense to the parotid gland, namely vanishing, on fat-saturated T2 and T1 postcontrast gadolinium-enhanced magnetic resonance imaging (MRI). The purpose of this study was to evaluate vanishing of parotid tumors on conventional MRI with and/or without postcontrast gadolinium-enhancement and on diffusion weighted imaging (DWI).

Methods: In 8 of 51 patients, ten parotid gland tumors had homogeneously enhanced lesions and were retrospectively analysed.

Differentiating parotid tumors by quantitative signal intensity evaluation on MR imaging.

Background: There have been no reports about quantitative evaluations of enhancing components of parotid tumors on conventional MR imaging.

Purpose: To evaluate the signal intensity of the enhancing components of tumors, including pleomorphic adenomas (PAs), Warthin tumors (WTs) and malignant tumors (MTs), on various MR sequences and to assess the usefulness of quantitative evaluations for differentiation among the three groups of tumors.

Material And Methods: A total of 39 histologically proven tumors, including 15 PAs, 17 WTs and 7 MTs, were enrolled in this study.

[Acute undifferentiated leukemia (stem cell acute leukemia) showing differentiation to Langerhans cell-like cells in lymph nodes].

A 75-year-old woman was referred to our hospital with suspected leukemia. Complete blood count demonstrated WBC 3,810/µl with 26% blasts, Hb of 11.7 g/dl and Plt of 18.