Biomedical subjects
Publications and source records attributed to A Ayhan.
A 24-year-old primigravid woman with cogenital hepatic fibrosis associated with cavernous transformation of the portal vein is described. Although the neonate could not survive because of the ileal atresia, the pregnancy and delivery did not pose a significant threat to the mother.
The nm23 gene, which encodes nucleoside diphosphate (NDP) kinase, is proposed as a metastatic suppressor gene and has been demonstrated to correlate inversely with metastatic potential in several tumours. To elucidate the role of nm23 in larynx carcinomas, we examined using immunohistochemistry the expression of the nm23 protein in matched sets of primary tumours and metastatic lymph nodes. nm23 Protein was expressed in all the carcinomas as well as in non-neoplastic larynx mucosa. Overexpression of nm23 protein was found in the majority of primary tumours compared with corresponding normal mucosa, while decreased expression was associated with poor differentiation and distant metastasis and/or recurrence. No significant difference in age, sex and stage was found between primary tumours with high and low nm23 protein expression. These results suggest that decreased nm23 protein expression may play a role in metastasis and/or recurrence in larynx cancer and therefore could be used as a prognostic factor.
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The wound-healing efficacy of recombinant human granulocyte-macrophage colony stimulating factor (rhGM-CSF) was studied in a mouse model. Full-thickness wounds were treated with liquid crystalline, emulsion, and niosome vehicles alone and with rhGM-CSF. The control group was non-medicated. Observation of the vehicle groups with and without the rhGM-CSF displayed better healing profiles than the control group. The vehicles were also evaluated among themselves and it was noted that emulsion base and niosome base groups gave significantly better healing profiles and histological results than the liquid crystalline base group. Among the rhGM-CSF containing groups, emulsion formulation displayed a stronger wound-healing effectiveness compared to the other formulations. In vitro release characteristics of the recombinant protein from the three vehicle formulations were demonstrated with diffusion cells. Histological and immunohistochemical evaluation was performed on biopsies taken on the last day of the experiment.
A retrospective analysis of 31 patients subjected to radical surgery and lyphadenectomy for microinvasive cervical cancer was carried out. The mean age of the patients at diagnosis was 51.4 years. Twenty-nine of the patients had depth of invasion of 3 mm or less whereas 5 of them had lymphovascular space invasion. Thus, 24 patients had microinvasive cervical cancer according to the SGO (Society of Gynecologic Oncology) criteria. While nine patients had minimal stromal invasion (< 1 mm) at diagnosis, the remaining 22 patients fulfilled the criteria of FIGO IA2 disease. Most of the patients had grade I disease. With worsening of differentiation lymphovascular space involvement increases from approximately 11% (2/18) to 50% (1/2). None of the patients had lymph node involvement. All patients are living with no evidence of disease with a mean survival of 39 months. Current FIGO criteria for microinvasive carcinoma permits us to define a subset of patients that can safely be subjected to a more conservative approach.
To determine the effectiveness of medical therapy in vulvar dystrophy, a retrospective, single-institute clinicopathologic study of 285 consecutive cases was carried out. Of the patients, 152 (53.3%) had squamous hyperplasia (SH), 72 (25.3%) had lichen sclerosus (LS), and 61 (21.4%) had lichen sclerosus with areas of squamous hyperplasia (LS + SH). Symptomatic response was 84.8% at 3 months and 92.7% at 6 months in patients with SH. These figures were 70.8% and 87.5% for patients with LS and 68.8% and 80.3% for patients with SH + LS, respectively. Histopathological response was 63.6% at 3 months and 74.8% at 6 months for patients with SH. These figures were approximately 29% and 42% for LS, and 21% and 34% for patients with SH + LS, respectively. Corticosteroids for squamous hyperplasia and testosterone for lichen sclerosus achieved a high symptomatic response. However, histologic remission rates were poorer.
The treatment modalities of 88 consecutive patients with uterine sarcomas were reviewed retrospectively in the hope of offering a more rational therapy especially in early stage disease. Of the patients, 47 had Leiomyosarcoma (LMS) (53.4%), 28 had Malignant Mixed Mesodermal Tumor (MMMT) (31.8%) and 8 had Endometrial Stromal Sarcoma (ESS) (9.0%). The patients with uterine sarcoma constituted 7.8% of all patients with uterine malignancies during the study period (88/1124). The mean age of this series at diagnosis was 49.2 years. This figure was 45.1, 53.2 and 35.3 for LMS, MMMT and ESS, respectively. The surgical procedure employed was total abdominal hysterectomy and bilateral salpingoophorectomy (TAH + BSO) in 53 (58.9%) patients and 35 patients underwent TAH + BSO and pelvic and paraaortic lymphadenectomy. The overall incidence of lymph node metastases was 28.5% (4/14) for MMMT and 5.8% (1/17) for LMS cases, respectively. The overall 3-year survival rate of this series was 29.5% (23/88). This figure was found to be 59.4% (22/37) for stage I disease and 27.2 (3/11) for stage II disease; The stage I patients with and without adjuvant therapy had similar survival rates. This study confirms that due to the existence of a substantial risk of lymph node metastasis, a complete surgical staging is necessary in the management of uterine sarcomas particularly of MMMT type. Another deserving finding is the failure to detect any therapeutic effect of adjuvant therapy in stage I patients.
A 24-year-old primigravid woman with adult type Gaucher's disease was admitted at 28 weeks of pregnancy. She was asthenic and the abdomen was markedly protuberant due to hepatosplenomegaly. A conservative approach with close monitorization of both mother and baby was planned. On the 39th week of pregnancy a healthy female baby of 3000 g was delivered via cesarean section. Apart from mild hematological complications, the pregnancy, the delivery and the puerperium were uneventful.
OBJECTIVE: To determine the incidence and clinical and pathological features of chromophobe cell carcinoma (CCC) among renal cell carcinomas (RCCs). MATERIALS AND METHODS: The records and nephrectomy samples from 166 patients who were operated on and followed up thereafter with a diagnosis of RCC were re-evaluated. New sections were cut and specific staining performed when deemed necessary. RESULTS: Of 166 patients with RCC, six were diagnosed as having CCC and, unusually, one patient had a mixed RCC with areas of CCC. Neither the symptoms nor radiological features of these seven patients differed from those of the patients with RCC; the serum ferritin levels of these seven patients were also within the normal range. These patients appeared to have a favourable clinical course. CONCLUSION: Chromophobe cell carcinoma is a distinct entity and must be distinguished particularly from oncocytoma and other variants of RCC. Although it seems to have a low malignant potential, metastatic CCC may have a worse prognosis.
A case of ovarian hyperstimulation syndrome (OHSS) associated with spontaneous pregnancy is reported with the hope of facilitating earlier recognition of this condition. Although OHSS is usually an iatrogenic complication, it can also occur spontaneously without any evidence of endocrinological disorder. Surgery was performed and induced a very rapid resolution of ovarian hyperstimulation.
BACKGROUND: To review the experience of seven cases of gestational trophoblastic neoplasia with central nervous system involvement. METHODS: Seven patients among 50 cases of malignant gestational trophoblastic neoplasia were analyzed retrospectively in a single institution. RESULTS: The mean age of the patients at diagnosis was 28.7 years (range: 20-34). While five of the patients presented initially with symptoms related to cranial involvement, the remaining two developed cerebral metastases during the therapy. In two patients, the presentation was so similar to a primary cranial pathology that craniotomy and biopsy revealed the trophoblastic involvement. The sites of involvement were the parietal lobe in three, temporal lobe in two and frontal lobe in two patients. Besides central nervous system involvement, four had additional lung and one had pelvic metastases. In terms of therapy, while five patients received methotrexate+actinomycin-D+cyclophosphamide regimen for 3 to 5 courses, only two could be administered additional intrathecal methotrexate. Since one patient exhibited a fulminant clinical course, she could not be delivered a chemotherapy regimen and was lost in two months of initial diagnosis. The other patient was administered modified Bagshawe protocol (5 courses) which was switched to etoposide+methotrexate+actinomycin-D+vincristine+cyclophosphamide (6 courses) due to development of resistance. She was still alive and free of disease after 24 months of initial diagnosis. Six of the patients were also delivered whole-brain irradiation simultaneously with chemotherapy. CONCLUSIONS: The prognosis of brain metastases still seems to be poor despite combination chemotherapy and radiotherapy. Measures should be focused on early diagnosis and prophylaxis.
Three cases of serous surface papillary carcinoma of the abdominopelvic peritoneum are presented. All of the patients were subjected to a relatively homogeneous management consisting of primary surgery and cisplatin based chemotherapy regimen. The second look procedures of two patients were found to be negative. Although these tumors are known to have a poor prognosis, aggressive surgery and cisplatin based chemotherapy seem to have promising results.
Since malignant transformation in a dermoid cyst is extremely rare, the clinicopathological characteristics of patients with squamous carcinoma arising in dermoid cyst are evaluated in the hope of offering a more rational therapy. Our first patient was lost to follow-up after surgery. In the second patient, with a gross stage III disease, after extensive surgery and multiagent chemotherapy we were able to achieve a remission period of 42 months. In the third patient with pelvic lymph node metastases, adjuvant radiation and chemotherapy was administered following surgical staging. She was free of disease 6 months after surgery. Malignant transformation in a dermoid cyst is a rare complication observed especially in older age groups. Thus, a frozen section in these decades may improve detection of this complication allowing a more accurate staging. Although poor prognosis is reported, an aggressive approach with cisplatinum based chemotherapy and radiation and even with secondary cytoreduction, long-term remission may be achieved.
A 60-year-old woman was admitted for postmenopausal vaginal bleeding. Hysterectomy specimens showed an intrauterine polypoid mass that was a typical papilloma microscopically, accompanying severe ichthyosis uteri. There was no sign of dysplasia or malignancy. We observed changes simulating koilocytosis in some of the papilloma cells, but these did not stain with antiHPV antibodies immunohistochemically.
Ten patients with Sertoli-Leydig cell tumors of the ovary treated consecutively were analyzed retrospectively for clinicopathological characteristics, treatment modalities and survival. All patients were subjected to a surgical procedure including unilateral salpingoophorectomy (USO) in 5, total abdominal hysterectomy, bilateral salpingoophorectomy (TAH+BSO) in 2, TAH+BSO and omentectomy and pelvic and paraaortic lymphadenectomy and appendicectomy in 3 patients. Following surgery, 5 patients were subjected to adjuvant VAC (vincristine+actinomycine-D+cyclophosphamide) chemotherapy. Sertoli-Leydig cell tumors constitued 0.6% of all ovarian neoplasms in our institution (10/1621). The mean age at diagnosis was 28.2 years. Of the patients, 8 had stage IA, one had IB and one had stage III disease at surgery. Bilaterality was observed in two patients (20.0%). Four patients had poorly-differentiated tumors, of whom 1 had a retiform pattern and 1 had a heterologue element, with marked mitosis whereas the others had well--or moderately--differentiated tumors. Only one patient presented with recurrence during pregnancy and died 16 months after initial surgery. Since most of the patients present with stage IA disease, a favorable outcome can be achieved in most of them and conservative surgery seems to be the treatment of choice in younger patients. However, late recurrences even in early stages, especially in patients with poorly-differentiated tumors, can be detected, resulting in a fatal outcome despite any form of aggressive therapy.
OBJECTIVE: To determine the most significant factors for persistent disease in women with hydatidiform mole. STUDY DESIGN: Eighty-two patients who were managed consecutively without prophylactic chemotherapy between 1973 and 1993 were analyzed retrospectively for clinical and pathologic features, including age of the patient, size of the uterus, human chorionic gonadotropin (hCG) level, presence of theca lutein cysts, evidence of preeclampsia or hyperthyroidism, history of hydatidiform moles, trophoblastic hyperplasia, nuclear atypia, necrosis and hemorrhage, trophoblastic maturation, presence of fibrinoid layer and ratio of cytotrophoblast to syncytial trophoblast. RESULTS: Thirty-one patients developed persistent trophoblastic neoplasia (38%). Of the parameters evaluated, elevated hCG level, advanced age, history of hydatidiform mole, presence of hyperplasia, marked nuclear atypia and necrosis, and hemorrhage were significant risk factors for persistent neoplasia after univariate analysis. Among the factors analyzed, trophoblastic hyperplasia (relative ration [RR] = 3.56), age (RR = 2.87) and history of mole (RR = 2.57) were identified as the most powerful indicators of persistent disease after multivariate analysis. CONCLUSION: Evaluation of the clinical and pathologic features, such as age, history of mole and presence of trophoblastic proliferation may aid in defining a subset of patients at high risk for persistent disease, who require closer follow-up and administration of prophylactic chemotherapy.