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S Heim

Publications and source records attributed to S Heim.

At least 235 records · Page 13Linked to original sources
PubMed1990

Characteristic chromosome abnormalities, including rearrangements of 6p, del(7q), +12, and t(12;14), in 44 uterine leiomyomas.

The cytogenetic analysis of 224 leiomyomas from 138 patients is presented. An insufficient number of mitoses was found in 35 tumors, normal karyotypes in 145, and clonal chromosome aberrations were detected in 44. The three previously identified cytogenetic subgroups were all represented in this series: del(7) (q21.2q31.2) was found in 11, trisomy 12 in five, and t(12;14)(q14-15;q23-24) in one leiomyoma. Rearrangements of 6p, including deletions, inversions, and various translocations, were found in eight tumors, thus delineating a new cytogenetic subgroup of uterine leiomyoma. The remaining 21 karyotypically abnormal tumors had nonrecurrent changes. One leiomyoma had two cytogenetically unrelated clones characterized by del(7)(q21.2q31.2) and +12. Karyotypic changes in two separate leiomyomas from the same uterus were identified in five patients; in three of them, different anomalies were found in the two tumors, whereas cytogenetically identical aberrations - del(7q) and dic(21;22) - were detected in two macroscopically discrete tumors. These findings suggest that whereas some multiple leiomyomas originate independently, others may be derived from the same neoplastic clone.

Chromosome Aberrations↗
PubMed1990

Complex karyotypic anomalies, including an i(5p) marker chromosome, in malignant mixed mesodermal tumor of the ovary.

Cytogenetic analysis of short-term cultures initiated from an ovarian malignant mixed mesodermal tumor yielded the following karyotype: 59-61, XX,t(1;?)(p36;?), +t(1;9) (q43;q21), +t(2;?)(p25;?), +i(5p), +i(5p), +7, +t(7;?)(p13;?), +8,der(11) (pter----cen----q23::q13----q23::q13----q23::?), +12, + der(13)t(13;15)(q21;q15), -15,der(16) (16qter----cen----16p13::hsr::8q21----8qter), +19, + der(20)t(X;20)(q13;p13), -22, +4 - 6mar. Because the only other cytogenetically characterized ovarian neoplasm of this rare histopathologic subtype also had a small metacentric marker interpreted as an isochromosome for the short arm of a B-group chromosome, we suggest that i(5p) constitutes a nonrandom anomaly in mixed mesodermal tumors.

Adenocarcinoma↗
PubMed1990

Multiple clonal chromosome aberrations in squamous cell carcinomas of the larynx.

Short-term cultures from five squamous cell carcinomas of the larynx were subjected to cytogenetic analysis. In the first three cases, two, three, and 10 chromosomally abnormal clones were detected. Single clonal abnormalities were found in cases 4 and 5. In addition to the clonal aberrations, a number of nonclonal changes were also present in all five tumors. None of the aberrations, clonal or nonclonal, was found in more than one tumor, nor did the rearrangements correspond to any of the consistently cancer-associated aberrations known from other tumors. The remarkably diverse karyotypic picture of the five squamous cell larynx carcinomas, in particular the finding of cytogenetically unrelated clones in three of them, suggests that some of these neoplasms are polyclonal rather than monoclonal.

Aged↗
PubMed1990

Trisomy 12 in uterine leiomyomas. A new cytogenetic subgroup.

Chromosome analysis of short-term cultures from uterine leiomyomas revealed trisomy 12 in six cases. In four of the tumors + 12 was the only karyotypic change. The fifth case also had trisomy 4, whereas the sixth had loss of one X chromosome as an additional aberration. These findings indicate that trisomy 12 characterizes a new cytogenetic subgroup of uterine leiomyoma.

Chromosomes, Human, Pair 12↗
PubMed1990

An inter-Nordic prospective study on cytogenetic endpoints and cancer risk. Nordic Study Group on the Health Risk of Chromosome Damage.

To investigate whether high rates of chromosomal aberrations (CAs), sister chromatid exchange (SCE), or micronuclei(MN) in peripheral lymphocytes indicate an increased risk for subsequent cancer, a prospective cohort study of 2,969 subjects cytogenetically examined between 1970 and 1988 in four Swedish, two Finnish, and two Norwegian laboratories was initiated. To standardize for the interlaboratory variation, the results of the three cytogenetic endpoints were trichotomized for each laboratory into "low" (1st to 33rd percentile), "medium" (34th to 66th percentile), and "high" (67th to 100th percentile]. Thirty-four cancers had been diagnosed in the cohort during the observation period (1970 to 1985). The point-estimates of the standardized morbidity ratio (SMR) in the three CA strata were 90, 92, and 180, respectively. This trend for a positive association was not statistically significant (p = 0.06). There was no significant trend between SMR and the trichotomized rates of SCE. In the subcohort examined for MN only two cases of cancer had been diagnosed until now. If subjects with "high" frequencies of CA or SCE have a two-fold (or greater) risk of developing cancer as compared with individuals who have "medium" or "low" frequencies, we estimate that there is a likelihood of 80% and 70%, respectively, that this will be detectable as significant (p less than or equal to 0.05) differences after a further follow-up period of 5 years. Weaker associations between cancer risk and the cytogenetic endpoints would not be possible to evaluate until even later follow-ups.

Chromosome Aberrations↗
PubMed1990

An improved technique for short-term culturing of human prostatic adenocarcinoma tissue for cytogenetic analysis.

An improved technique for cytogenetic analysis of malignant prostatic tissue is described. This method is based on 1) prolonged mild collagenase treatment, 2) careful washing and repeated centrifugation and sedimentation of the disaggregated material to isolate viable prostatic epithelial cells, 3) short-term culture on collagen R-coated chamber slides with PFMR-4 medium supplemented with mitogenic factors, and 4) daily inspection of the cultured cells to determine the optimal time for harvesting. Twenty consecutive primary prostatic adenocarcinomas were cultured and processed for cytogenetic analysis. Outgrowth of pure epithelial colonies was obtained in 16 cases; in three there was a mixture of epithelial colonies and fibroblasts, and in one there was no cell growth. More than 25 metaphases with chromosomes of high banding quality could be analyzed per case, in particular in cultures from the final pellet fraction. Clonal chromosome aberrations were present in four tumors, and nonclonal structural changes were present in nine. Six tumors showed only normal diploid karyotypes.

Adenocarcinoma↗
PubMed1990

Complex karyotypic changes, including rearrangements of 12q13 and 14q24, in two leiomyosarcomas.

Cytogenetic investigation of short-term cultures from two leiomyosarcomas revealed complex karyotypic changes in both cases. The first tumor, a subcutaneous leiomyosarcoma of the knee, had the karyotype 70-80,XY, +X, +Y, +1, +1, +2, +2, +3, +3, +4, +4, +7, +7, +8, +8, +9, +10, +15, +15, +16, +16, +18, +19, +20, +21, +21, +22, +22,t(?;5)(5;21)(?;q35p11;q11), t(?;5)(5;21)(?;q35p11;q11), +del(11)(q22),der(13)t(12;13)(q13;q22),der(14)t(9;14)(p11;p11), +14p+, +t(20;?)(q13;?), +t(20;?)(q13;?), +2 mar. A polyploidized clone with 120-150 chromosomes was also observed. DNA flow cytometry revealed only one abnormal peak, corresponding to a DNA index of 1.76. The other tumor, a uterine leiomyosarcoma, had the karyotype 61-67, X, -X, +1, +3, +5, +6, +7, +8, +9, +12, +13, +15, +t(1;1)(p32;q32), +der(1)t(1;8)(p13;q11), +del(2)(p11), +del(2)(q22), +del(2)(q22), +del(3)(p13), +i(5p),t(8;14)(q24;q24), +der(8)t(8;14) (q24;q24), +del(10)(p12),der(11)t(11;15)(p15;q11),t(16;?)(p13;?),t(16;?)(q24;?), der dic(17) (17pter----cen----17q25::hsr::17q25----cen----17pte r), +t(19;?)(p13;?), +der dic(20)(20pter----cen----20q12::hsr::20q12----cen----+ ++20pter), +mar. The DNA index was 1.59. The finding in these leiomyosarcomas of rearrangements of the same regions of chromosomes 12 and 14 that are involved in the tumor-specific t(12;14)(q14-15;q23-24) of uterine leiomyoma indicates that the same genes in 12q and 14q might be important in the pathogenesis of benign and malignant smooth muscle tumors.

Aged↗
PubMed1990

Chromosome rearrangements in two uterine sarcomas.

Cytogenetic analysis of short-term cultures from two uterine sarcomas revealed clonal chromosome abnormalities in both cases. A locally recurrent mixed mesodermal tumor had the karyotype 61,XX,+2,+3,+del(5)(q11),+6,+7,+del(7)(q32),+8,+8,+8,+10, -11,-11,+der(11)t(1;11)(q12;p15),+der(11)t(1;11)(q12;p15),+der(11)t(1;11)(q12;p15),+del(12)(q14q21),+13,+15,del(17)(q23),+20. The other tumor, a lung metastasis from a uterine leiomyosarcoma, had several karyotypically abnormal clones. Two of them consisted of highly aberrant cells with modal chromosome numbers of 82 and 153, respectively, but because of insufficient quality the complex anomalies could not be identified. Various chromosomal changes that included translocations, deletions, insertions, and numerical rearrangements (always with extra chromosome 7 material) were identified in pseudo- or near-diploid cells, resulting in nine additional cytogenetically abnormal clones.

Aged↗
PubMed1990

Cytogenetics in the investigation of haematological disorders.

Chronic and acute, myeloid and lymphatic haematological neoplasms are characterized by acquired genetic rearrangements that, in the majority of cases, can be detected as clonal chromosomal abnormalities. The aberrations are either primary, meaning that they contribute to the establishment of the neoplasm, or secondary, in which case they are acquired during the clonal evolution and malignization of the neoplastic cells. The abnormalities are non-randomly distributed; the aberration pattern differs from disease to disease and sometimes is so characteristic that individual rearrangements may be virtually pathognomonic for particular neoplasms. The cytogenetic characterization of haematological malignancies is of two-fold importance. First, the recurrent aberrations provide us with an insight into the pathogenetic mechanisms that are operative. They pinpoint those areas of the human genome that carry genes or regulatory sequences whose function is disturbed in leukaemias and lymphomas. Using DNA recombinant techniques in addition to chromosome-level investigations of these cancer-associated rearrangements, the molecular pathology of leukaemias and lymphomas is now gradually being unravelled. Second, even before the long-term goal of a more fundamental understanding of the neoplastic process is reached, the cytogenetic aberrations have a direct clinical importance. The finding of an acquired, clonal chromosome abnormality in haematopoietic cells (-Y in old men is an exception) means that the patient has a neoplastic disease. Often, but by no means always, the type of aberration is also informative as to which type of neoplasm is present. During therapy, remission and relapse can be monitored by cytogenetic analyses. Finally, the karyotypic pattern influences prognosis and may thus be taken into account when the choice of therapy is made.

Chromosome Aberrations↗
PubMed1990

Bone marrow karyotypes in 94 children with acute leukemia.

During the last 10 years, we have cytogenetically analyzed at diagnosis bone marrow cells from a total of 94 children with acute leukemia. Of the 78 children with acute lymphatic leukemia (ALL), 53 (68%) had clonal acquired chromosome abnormalities; in the group with acute nonlymphatic leukemia (ANLL), the corresponding proportion was 13 out of 16 (81%). Among the cytogenetically abnormal ALL patients, the most numerous subset was the hyperdiploid cases with stemlines containing 51 or more chromosomes (26 of 53 abnormal cases; 49%). This is a clearly higher proportion than has been reported in large series from other centers. Deletions of 6q were present in 8 cases and rearrangements of 12p in 5. Of the 7 T-cell ALLs, 3 had translocations of the distal part of 7q, i.e., of the region where the beta T-cell receptor is encoded. Only 2 of 26 (8%) patients with leukemic stemlines with more than 50 chromosomes have relapsed; the remainder are still in first remission (mean observation time 42 months). This may be contrasted with 6 of 25 (24%) relapses among the cytogenetically normal (observation time 41 months), and 8 of 27 (30%) relapses among ALL patients with aberrations but with less than 51 chromosomes (observation time 26 months). Our results support the conclusion that the finding of a markedly hyperdiploid leukemia karyotype is indicative of good prognosis in ALL.

Adolescent↗
PubMed1990

Deletion of 14q in non-Hodgkin's lymphoma.

6 patients with non-Hodgkin's lymphoma [3 with small cell lymphocytic lymphoma of B-cell type (SL), and 1 each with follicular centroblastic/centrocytic, centroblastic, and immunoblastic lymphoma] and with the acquired cytogenetic abnormalities del(14) (q22) or del(14) (q24) are described. An evaluation of these 6 cases and 41 other lymphatic neoplasms with 14q deletion known from the literature revealed that 37 had a breakpoint in bands q22 to q24. The deletions occur significantly more often in lymphomas of SL morphology and in the leukemic counterpart, chronic lymphocytic leukemia, than in other types of lymphatic malignancies (p less than 0.001).

Aged↗
PubMed1990

Structural chromosomal abnormalities of 3q in myelodysplastic syndrome/acute myeloid leukaemia with Sweet's syndrome.

Structural rearrangements in the long arm of chromosome 3, del(3)(q12q25) and t(3;5)(q21-25;q31-33), were observed in bone marrow cells from 2 patients with myeloid neoplastic disorders (myelodysplastic syndrome and acute myeloid leukaemia) and acute febrile neutrophil dermatosis (Sweet's syndrome). 3 of the 4 patients with leukaemia-associated Sweet's syndrome and acquired chromosome abnormalities known from the literature also had 3q changes, in 2 involving band 3q21.

Bone Marrow↗
PubMed1990

Trisomy 7, trisomy 10, and loss of the Y chromosome in short-term cultures of normal kidney tissue.

Numerical chromosome aberrations are common in several types of malignant tumors. Recently, trisomy 7 and loss of the Y chromosome were described in cultures from nonneoplastic tissue, making the significance of these aberrations as cancer-associated changes doubtful. We herein report the mosaic occurrence of trisomy 7 in four consecutive short-term cultures initiated from normal kidney tissue. Smaller clones with trisomy 10 were present in three cases, and the only culture established from a male also showed mosaic loss of the Y chromosome.

Adult↗
PubMed1990

Chromosomal evolution and tumor progression in a myxoid liposarcoma.

A myxoid liposarcoma showed macroscopic, histologic, and cytogenetic heterogeneity. In one of three myxoid nodules and in the surrounding lipoma-like tumor tissue, the translocation t(12;16)(q13;p11), known to be specific for myxoid liposarcoma, was found as the sole chromosomal abnormality. In the other two nodules, additional rearrangements involving chromosomes 1, 12, and 16 were found. These aberrations were probably secondary to the primary t(12;16), and are cytogenetic evidence of clonal evolution. The complex chromosome aberrations were present in those tumor parts that had more malignant histology, indicating that the acquisition of secondary chromosomal aberrations parallels the histologic manifestations of tumor progression.

Chromosome Aberrations↗
PubMed1990

Chromosome abnormalities in cancer.

Karyotypic abnormalities have been described in more than 10,000 human neoplasms analyzed by means of chromosome banding. These aberrations are of three different kinds: primary abnormalities, which are essential in establishing the tumor; secondary abnormalities, which develop only after the neoplasm is established but which nevertheless may be important in tumor progression; and cytogenetic noise, which is the background level of nonconsequential aberrations. These latter changes are, in contrast to the primary and secondary aberrations, randomly distributed throughout the genome. The primary abnormalities, of which more than 100 have been identified, are strictly correlated with particular neoplastic disorders and even with histopathological subgroups within a given tumor type. To these purely cytogenetic data implicating specific genetic changes in carcinogenesis may now be added the growing evidence of molecular specificity emerging from recombinant DNA studies. It appears that both currently known classes of directly cancer-relevant genes, the dominant oncogenes and the recessive anti-oncogenes, are located at precisely those genomic sites that are visibly involved in neoplasia-associated chromosomal rearrangements. The molecular genetic data thus support the cytogenetic conclusion that the distribution of consistently cancer-associated breakpoints reflects the genomic position of genes that, either directly or through the control function they exert, are essential in the proliferation and differentiation of human cells.

Chromosome Aberrations↗
PubMed1990

Remarkably long survival of a patient with Ph1-positive chronic myeloid leukemia and 5' bcr rearrangement.

Chronic myeloid leukemia (CML) was diagnosed in a 19-year-old man in 1961, and the disease remained in chronic phase, with occasional exacerbations, for 27 years. In 1976, when the first cytogenetic analysis was performed, t(9;22)(q34;q11) was found as the sole abnormality in all mitoses. During accelerated phase in 1988, a second cytogenetic investigation showed the karyotype 45,XY,t(9;22)(q34;q11),-15,-17,+der(15) t(15;17)(p13;q11). Molecular analysis revealed a rearrangement in the 5' end of the major breakpoint cluster region (M-bcr). With the case presented here, sublocalization of the bcr breakpoint has now been undertaken in altogether five CML patients with extremely long survival. It is noteworthy that in all these cases the chromosome 22 breakpoint was located in the 5' region of the M-bcr.

Adult↗
PubMed1990

Trisomy 14 in atypical chronic myeloid leukemia.

Trisomy 14 was the sole karyotypic anomaly in three patients with Ph1-negative chronic myeloid leukemia, and the only abnormality in one of three clones in a fourth case. The hematologic features were partly myeloproliferative, partly myelodysplastic, and included myeloid hyperplasia, neutrophilia without basophilia, a relatively high number of immature granulocyte precursors in the peripheral blood, and monocytosis in three and dysgranulopoiesis in two of the patients. These data, in combination with the patients' high age at diagnosis, their short survival, and the lack of rearrangements of the major breakpoint cluster region (M-bcr) in the two cases where cells were available for molecular analysis, indicate that all four patients suffered from atypical chronic myeloid leukemia (aCML). We suggest that trisomy 14 may be a characteristic karyotypic abnormality in this hematologic disorder.

Aged↗