Extranodal marginal zone lymphoma (EMZL, MALT lymphoma) and carcinoid are neoplasms occurring most frequently in the gastrointestinal tract and respiratory system. Although each of them occurs ...relatively frequently and separately, the simultaneous appearance of these two neoplasms is exceptionally rare, and only a few cases in the gastrointestinal tract have been described so far. We report a case of a 70-year-old female with the simultaneous presence of MALT lymphoma and tumorlet in the middle lobe of the right lung. To the best of our knowledge, this is the first report of such a collision tumor at the same anatomical site.
CD99 is a protein initially described in the Ewing sarcoma family of tumors, but growing evidence has shown its expression in other tumors of mesenchymal, hematopoietic and even epithelial origin. ...Some articles report CD99 in metaplastic carcinoma of the breast, a subtype of breast carcinoma (BC) with pronounced epithelial to mesenchymal (EMT) phenotype. Our aim was to analyse the potential relationship between CD99 and selected EMT (vimentin, E-cadherin, Twist) and proliferation markers (Ki-67, c-myc, cyclin D1, topoisomerase 2), molecular subtypes of BC, as well as overall survival (OS) and progression-free survival (PFS). In a group of 122 cases CD99 membrane expression was seen in 14 (11.5%) cases: strong in 11 (9%) and moderate in 3 (2.5%). Expression of CD99 correlated with low cyclin D1 index, high level of topoisomerase 2 expression and lack of progesterone receptor (PR) but not with EMT characteristics. Additionally, strong expression of CD99 correlated with triple negative molecular BC phenotype. CD99 was prognostically irrelevant for OS and PFS. CD99 correlates with selected proliferative markers and low ER/PR receptor status but not with patients' outcome in BC. Further studies are required to explain precisely its role in molecular pathogenesis of BC.
Olfactory neuroblastoma (ONB) is a rare neoplasm of the sinonasal area with neuroendocrine differentiation. ISL-1, TTF-1 and PAX5 are transcription factors that are frequently upregulated in tumors ...showing neuroendocrine differentiation. The aim of our study was to evaluate these markers in a group of ONBs. We included 11 ONBs from 4 large university hospitals. Immunohistochemical expression of TTF-1, PAX5 and ISL-1 was evaluated. TTF-1, ISL-1 and PAX5 were expressed in 3/11 cases (27.27%, h-score: 3-45), 7/11 cases (63.64%, h-score: 23-200), and in 3/11 cases (27.77%, h-score 3-85), respectively. The patient with the strongest PAX5 reactivity exhibited an aggressive clinical course with rapid dissemination to the spine and death shortly after the diagnosis. No significant correlation in the expression of PAX5 and TTF-1 ( = 0.43; p = 0.18) was observed. ISL-1 is widely expressed in tumors with neuroendocrine differentiation and therefore of limited value in their differential diagnosis. TTF-1 positivity does not exclude the diagnosis of primary ONB, although usually only a small percentage of cells are positive. PAX5 expression is infrequent (27.27%) in ONB; however, if present it can be associated with a very aggressive clinical course.
A clonal lymphocyte proliferation in patients with NHL interferes with the immune system, disturbing both humoral and cellular immunity. An antileukemic therapy additionally affects the immune system ...functioning. A higher than expected in general population incidence of infections and other malignancies is the consequence of impaired immunological surveillance. The fate of patients is also influenced by the possibility of low grade NHL transformation in more aggressive large B cell lymphoma, called the Richter's transformation.
We present the case of patient with multiple malignancies small lymphocytic B-cell lymphoma (SLL), renal cell carcinoma (RCC), pulmonary adeno-carcinoma and recurrent laryngeal papillomas, that occurred in different stages of lymphoma diagnosis and treatment. He also developed SLL transformation in large B-cell lymphoma 7 years after the initial diagnosis.
A clinical course, together with diagnostic and therapeutic difficulties we faced, are discussed in relation to the literature data.
Bone marrow is an exceptionally uncommon site of metastatic dissemination in angiosarcoma (AS) as only single case reports have been published so far. We report a case of a 72-year-old male with ...epithelioid angiosarcoma of the liver who subsequently developed erythroblastic anemia. The trephine bone marrow biopsy revealed total replacement of the normal hematopoiesis by diffuse infiltrate of AS. This rare complication of the clinical course of this tumor should be taken into account in the pathological diagnosis of patients with AS presenting with hematological abnormalities.
Skin pigmentation disorders are frequent problems in dermatological practice. They have a heterogeneous aetiology and clinical picture, and demand a flexible therapeutic approach. We present a case ...of a 10-year-old boy with idiopathic eruptive macular pigmentation. It is a rare chronic entity which causes only an aesthetic defect and demands no treatment. Key words: idiopathic eruptive macular pigmentation, ashy dermatosis, macules.
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