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PubMed1991

[Needle aspiration cytology in euthyroid uninodular goiter].

Fine needle aspiration cytology (FNAC) has been shown to be second only to surgical biopsy for demonstration of malignancy in thyroid nodules. A prospective study of FNAC for euthyroid uninodular goiter (EUG) was conducted between January 1987 and June 1990, totaling 87 patients of which 61 were submitted to surgical biopsy. FNAC in the latter were interpreted as benign in 41 cases, suspected malignancy in 8, and definitely malignant in 7. The remaining 5 smears were considered technically inadequate for diagnosis. In 39 of the 41 patients with a benign (negative) cytology result, the histopathological diagnosis confirmed the absence of a neoplastic process (2 false negatives). In 12 of the 15 patients with a suspected malignant (positive) cytology result, a subsequent histopathological report confirmed a neoplastic process (3 false positives). Thus FNAC had a sensitivity of 86% and a specificity of 93%. We conclude that FNAC is a valuable tool for the diagnosis of erythroid goiter and could help reduce significantly the number of patients who need to be surgically intervened.

Adolescent↗
PubMed1998

Cerebral lymphomas in AIDS. Neuropathological study.

A morphological analysis was done of 15 cases of malignant cerebral lymphomas selected from the material of 160 brains of patients, who died in the course of full-blown acquired immune deficiency syndrome (AIDS) during the period of 1987-1997. Cases with cerebral lymphomas comprised 9.4% of the whole collection. There were 13 males and 2 females in the studied group. The patients age ranged from 25 to 61 years. In 10 cases lymphomas were localized solely in the central nervous system, and in further 4 they were accompanying systemic neoplastic process. In one case lack of clinical and autopsy data did not permit classification of neoplasm to the primary or to the secondary group. In 13 cases immunophenotype of the lymphomas was characterized by immunohistochemical methods. In 11 cases neoplastic cells originated from B cells line and in 2--from T cells line. In 10 cases lymphomas were found in macroscopic examination, in the remaining 5 cases they were disclosed at the brain histopathology. The dynamics and extensiveness of the neoplastic process were different in particular cases. In most of them the process was multifocal and manifested in the form of diffuse proliferation, formed tumors with changing nature of their delineation and as multilayer perivascular cuffs. The characteristic feature of diffuse neoplasmatic growth was the appearance of large coagulative necroses in the central parts of tumors. Neoplastic foci were localized most often in the cerebral hemispheres (white matter, basal ganglia, periventricular regions), less frequently in the brain stem and cerebellum. In one case diffuse lymphoid growth involved selectively leptomeninges. In most of the cases leptomeningeal infiltrations accompanied large parenchymal neoplastic foci. The most striking feature of our collection consisted in concomitance of cerebral lymphomas with HIV-specific brain pathology and/or opportunistic infections mostly of viral etiology. Their frequency was much higher than in cases of AIDS without cerebral lymphomas. Another finding which seems to be worth mentioning was the appearance of morphological exponents of various pathological processes such as for instance multinuclear giant cells, CMV inclusions within neoplastic tissue. The relatively frequent presence of numerous HIV-specific giant cells on the periphery of lymphomatous tumors suggests pathogenetic participation of immune deficiency virus in the blastomatous transformation of lymphoid cells within the central nervous system.

Adult↗
PubMed1996

Thymic lymphosarcoma of T cell lineage in a koala (Phascolarctos cinereus).

OBJECTIVE: To diagnose and characterise thymic lymphosarcoma in a koala. DESIGN: A pathological case. ANIMAL: Seven-year-old female koala. PROCEDURE: The neoplastic process was investigated macroscopically, haematologically, histologically and immunohistologically. RESULTS: The koala had difficulty swallowing because of a medial swelling in the lower neck. Biopsy of this mass and blood examination revealed lymphosarcoma with a leukaemic manifestation; necropsy and histopathological examination showed the mass to be thymus. Palatine tonsils, cervical, axillary and mesenteric lymph nodes, spleen, liver, gut, bronchi, genitalia and bone marrow were infiltrated by neoplastic cells. Immunohistological staining of the thymic mass, cervical and mesenteric lymph nodes, bone marrow, spleen and gut revealed the neoplastic cells to be of T lymphocyte origin (positive for both anti-human CD3 and CD5). CONCLUSIONS: It is speculated that the neoplastic process originated in the thymus and was disseminated by bloodborne neoplastic cells. This first report of thymic lymphosarcoma in a marsupial confirms that antibodies raised originally to investigate human lymphoid neoplasia can cross-react with neoplastic lymphocytes in koalas.

Animal Diseases↗
PubMedDate not supplied

Cytogenetic findings in untreated patients with essential thrombocythemia.

Essential thrombocythemia (ET) is a chronic myeloid disorder that is characterized by persistent thrombocytosis, thrombohemorrhagic symptoms and a low risk of transformation to leukemia. Chromosomal abnormalities in ET are very rare and most of the patients studied were either in leukemic transformation or they had received treatment with cytotoxic agents. The number of cases studied at the time of diagnosis is very limited. In the present study, 67 cases with ET, at the time of diagnosis, were cytogenetically studied by a G-banding technique. Among them, only four presented chromosomal abnormalities. In two cases, a del(5)(q13q33) was identified, accompanied by trisomy 20 in one case, while, in the other case, monosomy 17 and a small marker chromosome were additionally found. In each of the remaining two abnormal cases, clonal isolated trisomy 13 or monosomy 14 were found, respectively. Since these chromosomal abnormalities were found at the time of diagnosis, they might be related to the neoplastic process. The documentation of more cases of chromosomal abnormalities in ET at the time of diagnosis may facilitate the identification of candidate genes involved in the neoplastic process.

Chromosome Aberrations↗
PubMedDate not supplied

[Polyneuropathy in the course of Hodgkin's disease: case report].

Polyneuropathy in neoplastic process practically may occur in every stage, before clinical signs, together with clinical signs and in the last period. In some percent of patients polyneuropathy may outstrip manifestation of neoplastic process even for many years. We present a 61-year-old patient in whom signs of polyneuropathy appeared before the signs of essential disease - Hodgkin's disease. Our case confirms the necessity of very careful and precise diagnostics of polyneuropathy with unclear aetiology.

Demyelinating Diseases↗
PubMed1983

Cancer of mamma virilis.

The authors describe a patient who, because of false shame, reported for treatment in the course of an advanced neoplastic process of the mamma. Combined treatment consisting of surgical castration, hormonotherapy and irradiation was applied. In about 30 per cent of patients thus treated a temporary remission or inhibition of the neoplastic process has been observed.

Breast Neoplasms↗
PubMed1987

Disseminated meningeal tumor in a dog.

A 6-year-old Golden Retriever was referred for evaluation of hind limb paresis and generalized weakness. Neurologic examination revealed multifocal cervical and lumbosacral spinal disease. Radiography and myelography failed to identify a lesion. Cerebrospinal fluid was markedly cellular and had a high protein concentration, consistent with myelitis or a neoplastic process. The dog did not improve with medical management. Gross and histologic examination of the brain and spinal cord revealed a thick meningeal surface characterized by polymorphic histiocytic-like cells to multinucleate giant cells. The neoplastic process was considered to be a disseminated meningeal polymorphic cell sarcoma.

Animals↗
PubMed2001

Fragile and unstable chromosomes in cancer: causes and consequences.

Cancer cells commonly exhibit various forms of genetic instability, such as changes in chromosome copy number, translocations and point mutations in particular genes. Although transmissible change seems to be an essential part of the neoplastic process, the extent to which DNA instability is a cause rather than a consequence of cancer is unclear. Chromosomal fragile sites have been proposed to be not only susceptible to DNA instability in cancer cells, but also associated with genes that contribute to the neoplastic process. Mutation at fragile site loci might therefore have a causative role in cancer. Recent studies on one class of human chromosomal fragile sites show that instability at fragile site loci can functionally contribute to tumor cell biology.

Animals↗
PubMedDate not supplied

[Rol of thallium-201/gallium-67 cerebral tomogammography in the differential diagnosis of cerebral space occupying lesions].

INTRODUCTION: Central nervous system (CNS) neoplasms are 10% of all tumors. A metastasis of an unknown primary neoplasm should be suspected in an adult with a cerebral tumor. In this location, the origin of most of metastases (62%) is lung, breast, skin and kidney. However, a differentiation of CNS focal infection and brain tumor, based on clinical status and morphologic imaging, may be difficult. A positive Tl-201 next to a negative Ga-67 SPECT brain scans is entirely in accord with brain metastatic tumor. CLINICAL CASE: A 72-year-old man, with history of excised bladder cancer, was admitted for neurological symptoms associated with a left occipital mass demonstrated by cranial CT and brain MRI. Clinicoradiological findings suggested a neoplastic process. Two cerebral biopsies just showed inflammatory cells. Tl-201 and Ga-67 SPECT brain scans were performed and their findings, an abnormal uptake of Tl-201 in the left occipital cortex and a negative Ga-67 scan, favored a neoplastic process. Radical exeresis of the lesion showed a metastatic adenosquamous carcinoma of probably lung origin. CONCLUSION: Tl-201 in addition to Ga-67 brain SPECT scans are a valuable tool for differential diagnosis between cerebral infection and brain tumour in patients with a sole cerebral mass lesion, especially when clinicoradiological findings and biopsy results are conflicting.

Aged↗
PubMed2001

Neoplastic disease through the human life span.

Cancers are different diseases that start and evolve each in its own manner, and trigger variable responses from the organism depending upon the neoplastic process under way and upon the physiopathology of the organism. The clinical incidence of the different cancers is spread through the human life span, with regional differences for each cancer: for many cancers the incidence is increasing at younger ages. More than half of the cancers become clinically manifest during the second half of the human life span and their frequency increases with age, but their natural history starts way back at earlier ages. The data suggest that the late manifestation is the result of the accumulation of events through time rather than of aging. Interestingly, late in the human life span the incidence of neoplastic disease declines. Is this due to the cohort of late survivals naturally resistant to the development of neoplastic processes, or to the characteristics of the last 'window' of the human life span? The evolution of neoplastic disease is the result of pre- and postnatal aggressions suffered by the organism, individual susceptibility, and developmental changes that evolve continuously from the beginning to the end of the human life span. The identification of the causes of the incidences of the different cancers through the human life span will help to understand both neoplastic disease and aging of the organism.

Aging↗
PubMed2001

Multilobular tumour of bone with no abnormalities on plain radiography in a dog.

A seven-year-old neutered female golden retriever was presented for an acute onset of cervical pain and ataxia. Intervertebral disc disease or neoplasia was suspected. There was no evidence of a soft tissue or bony mass on physical examination or survey radiographs. Cerebrospinal fluid analysis did not show any evidence of a neoplastic process. Myelographic evaluation identified an extradural mass lesion extending from inside the calvarium to the mid-body of the first cervical vertebra. No additional diagnostic tests were performed as the owners elected for euthanasia because of the high possibility of a neoplastic process with an accompanying poor prognosis. Multilobular tumour of bone was diagnosed on postmortem examination.

Animals↗
PubMed2001

Oncoprotein expression in human breast epithelial cells transformed by high-LET radiation.

PURPOSE: The aim of the present work was to analyze the expression of oncoproteins that are frequently altered in breast cancer with specific phenotypic stages in the neoplastic process. MATERIALS AND METHODS: Expression of c-myc, c-jun, c-Ha-ras and the tumor suppressor gene p53 oncoproteins were examined by immunohistochemical staining coupled with confocal microscopy in transformed and tumorigenic human breast epithelial cells induced by high-LET alpha-particles (150 kcV/microm). RESULTS: MCF-10F cells, irradiated with single and double doses of 60 cGy alpha-particles and subsequently treated with cstrogen, showed gradual phenotypic changes including altered morphology, increased cell proliferation relative to control, anchorage-independent growth, invasive capabilities and tumorigenicity in nude mice. MCF-10F cells irradiated with a second dose of 60 cGy alpha-particles after estrogen treatment (60 cGy+ E/60 cGy+E) showed tumorigenicity both in SCII) and nude mice. Alterations in the protein expression of several oncogenes including c-myc, c-jun, c-Ha-ras and the tumor suppressor gene p53 were detected in alpha-particle-irradiated cells and in those cells subsequently cultured in the presence of estrogen. The expression level of these oncoproteins correlated with the progressive nature of the neoplastic process. CONCLUSION: These studies suggest that overexpression of several oncoproteins is important in the neoplastic transformation of human breast epithelial cells induced by high-LET radiation. In addition, use of endocrine factors such as estrogen allows the examination of various aspects of protein expression providing the basis for understanding the complex interactions of hormones and genes.

Animals↗
PubMed1981

Cervical carcinoid ("argyrophil cell" carcinoma) associated with an endocervical adenocarcinoma: a light and ultrastructural study.

On microscopic examination of a cervical carcinoid removed from a 29-year-old woman, foci of endocervical adenocarcinoma in situ (AIS) and severe squamous dysplasia were present immediately adjacent to the invasive carcinoid tumor. Cells of the carcinoid tumor contained abundant intracytoplasmic argyrophilic granules and numerous neurosecretory granules (NSG) on ultrastructural study. Neoplastic cells of the endocervical AIS were devoid of argyrophilic granules and contained no NSGs. The present neoplastic process appeared similar to cases of a "mixed" type neoplasm composed of a carcinoid tumor and an adenocarcinoma, which have been reported from several areas of the body but only once previously from the cervix. The possible mechanisms accounting for such an unusual neoplastic process are discussed.

Adenocarcinoma↗
PubMed1989

Poly(A+)RNA levels of growth-, differentiation- and transformation-associated genes in the progressive development of hepatocellular carcinoma in the rat.

The development of chemically induced hepatocellular carcinoma in the rat proceeds through a series of premalignant changes that may ultimately progress to a primary malignant tumor. Using the selection technique based on diminished binding of preneoplastic hepatocytes to tissue culture plates precoated with asialofetuin, we have isolated poly(A+)RNA from early preneoplastic foci as well as preneoplastic persistent nodules and primary hepatocellular carcinoma induced by the Solt-Farber protocol in the Fischer rat. The steady-state poly(A+)RNA levels of genes traditionally associated with growth, differentiation and/or transformation were then determined to address the question of their temporal expression in the multistep nature of cancer development. Ornithine decarboxylase- and P53-specific transcripts did not significantly change in preneoplastic foci but were increased in later-stage preneoplastic nodules and hepatocellular carcinoma. Albumin-specific transcripts were decreased in all hepatocellular carcinoma but there was no consistent coordinated increase in alpha-fetoprotein-specific transcripts. c-myc and raf transcripts increased at the very early preneoplastic foci stage and continued to increase throughout the neoplastic process. No L-myc or N-myc transcripts could be detected in any RNA sample. c-Ha-ras-specific transcripts were essentially unaltered in all RNA samples whereas no c-Ki-ras or N-ras transcripts could be detected throughout the neoplastic process. In addition, no dominant-acting transforming mutations in the ras gene family were detected by DNA transfection experiments using NIH/3T3 cells.

Animals↗
PubMed1983

[Clinical relevance of the "cockade phenomenon" in abdominal ultrasonic diagnosis].

The ultrasonic diagnosis "cockade sign" in patients with unexplained abdominal complaints was investigated by means of endoscopy and X-ray studies of the gastrointestinal tract. The following final diagnoses were established: gastric cancer in 24 patients (16,2%), colonic carcinoma in 31 patients (21%), intraabdominal tumor without infiltration of the GI-tract in 19 patients (12,8%), inflammatory bowel disease in 35 patients (23,6%). In 39 patients (26,4%) no inflammatory or neoplastic process of the GI-tract could be found. Most of these patients were suffering of a spastic colon. If a tumor of the gastrointestinal tract can be made visible by ultrasonography, this may shorten the diagnostic procedure. However, ultrasonic investigation of the abdomen cannot exclude an abdominal inflammatory or neoplastic process. Therefore, it is only useful as a screening procedure.

Abdomen↗
PubMedDate not supplied

Surgical and multimodal approaches to cancer of the oesophagus: state of the art.

This review article aims to discuss the modalities of oesophageal resection, to define the categories of patients who are most likely to benefit from oesophagectomy with extensive lymph node clearance, and to analyse the eventual contribution of nonsurgical neo-adjuvant or adjuvant therapies to improving long-term survival rates achieved by surgery alone. Both the review of the literature devoted to potentially curative treatment of oesophageal cancer and the authors' own experience indicate that resection of the oesophageal tube en bloc with the locoregional lymph nodes provides patients with the best chance of long-term survival and cure. This is true, even though some of the resected lymph nodes are metastatic. Most phase III comparative studies fail to shown any overall survival improvement following multimodal therapy in comparison with surgery alone, so that there is now no scientific reason for systematic addition of radio- and/or chemotherapy to extensive surgery in potentially resectable neoplastic processes. However, neo-adjuvant radio- and/or chemotherapy is indicated in suspected non-resectable T4 tumors for downstaging and subsequent oesophageal resection in good responders. The benefit in terms of long-term survival and cure that can be expected from adjuvant chemo- and/or radiotherapy after radical resection of a neoplastic process having already spread into a large number of loco-regional lymph node requires objective evaluation by prospective, randomized studies.

Combined Modality Therapy↗
PubMed2000

Dermatologic diseases of the breast and nipple.

Breast and nipple skin is commonly affected by various inflammatory and neoplastic processes. Despite this fact, many physicians are unaware of the spectrum of diseases that can involve this area. Because breast and nipple skin represents a cosmetically, sexually, and functionally important entity to most patients, awareness of these disease entities is invaluable. This article reviews the normal anatomy of the breast, cutaneous manifestations of neoplastic processes that can present in these areas, and common inflammatory diseases of the breast and nipple skin.

Anticoagulants↗
PubMed2004

Pediatric submandibular triangle masses: a fifteen-year experience.

BACKGROUND: The purpose of this study was to evaluate the surgical results of pediatric submandibular triangle masses, with specific attention to neoplastic processes. METHODS: We retrospectively reviewed the medical records of 105 patients aged 6 months to 21 years who underwent surgery in the submandibular triangle at a major pediatric tertiary care hospital from 1987 to 2001. RESULTS: One hundred five patients who underwent surgery in the submandibular triangle were included in the study. Twenty patients had neoplastic processes, six of which were of primary salivary origin (two mucoepidermoid carcinomas and four pleomorphic adenomas). Twenty-four patients underwent excision of inflamed or infected lymph nodes, and 23 patients underwent excision of inflamed or infected submandibular glands. Thirty-eight patients were included who underwent surgery for sialorrhea or to gain access for another surgical procedure. Complications included tumor recurrence, transient and permanent marginal mandibular nerve weakness, ranula, postoperative fluid collection, and cellulitis. Duration of follow-up ranged from no follow-up to 11 years. CONCLUSION: Surgical excision of submandibular triangle masses is uncommon. We present our experience with these lesions, with a discussion of diagnosis, surgical indications, and surgical complications.

Adenoma, Pleomorphic↗