Internal medicine
-
Plasmablastic lymphoma (PBL) is an aggressive subtype of large B-cell lymphoma associated with immunodeficient states, such as HIV and EBV infections, and aging. PBL frequently harbor STAT3 mutations, which are crucial for their development. ⋯ Large granular lymphocytes and T-cell receptor rearrangement were detected, thus leading to the diagnosis of T-LGLL and PRCA. This is the first documented case of PBL with T-LGLL and PRCA, offering insight into PBL's pathophysiology and the complications of PBL.
-
We herein report two patients with connective tissue disease who developed primary peritoneal cancer (PPC). Serum Krebs von den Lungen-6 (KL-6) levels increased when PPC was diagnosed, and these levels were correlated with the treatment and worsening of PPC in both cases. ⋯ In the other patient with dermatomyositis and no ILD, PPC was diagnosed with elevated KL-6 levels four months post-treatment, without ILD development. Clinicians should be reminded that KL-6 is a tumor marker in various cancers.
-
A 79-year-old man with smoldering multiple myeloma (MM) developed sudden severe thrombocytopenia and active bleeding. Since anti-GPIIb/IIIa autoantibodies were detected on the platelet surface, thrombocytopenia due to an autoimmune etiology was diagnosed. ⋯ MM is rarely associated with immune thrombocytopenic purpura (ITP). Although the underlying pathogenesis of MM and ITP remains elusive, anti-myeloma drugs might be beneficial.
-
We encountered a 67-year-old Japanese man with GNE myopathy and homozygous variants (c.1807G>C, p. V603L) of the GNE gene. ⋯ Although severe heart failure is rare in GNE myopathy, mild cardiac dysfunction (ejection fraction 46.1%) was observed. Furthermore, respiratory dysfunction was noted with a preserved diaphragm.
-
Thyroid transcription factor 1 (TTF-1) is primarily expressed in lung and thyroid cancers, but it has also been observed in other cancers. A 60-year-old woman presented with worsening dyspnea, pleural effusion, lung metastases, a right ovarian tumor, and para-aortic intra-abdominal lymph node metastasis. ⋯ An adenocarcinoma positive for TTF-1 was identified, thus confirming the diagnosis of ovarian cancer. Our findings revealed that TTF-1 positivity does not always signify a lung cancer origin.