Autopsy findings in fetuses with cystic hygroma: a literature review and our center's experience.

PURPOSE OF INVESTIGATION: To report our experience of autopsied cases of fetal cystic hygroma (CH) and discuss the role of fetal autopsy in genetic counseling. METHODS: A review of autopsy reports at our institution revealed 18 cases of fetal CH over a 10-year period (from 2000 to 2010). The clinical data, results of cytogenetic analysis and prenatal ultrasound findings were also retrieved and compared to the autopsy findings. RESULTS: Fetal death was due to intrauterine death in eight cases, therapeutic abortion in eight cases and spontaneous abortion in two cases. Cytogenetic analysis was available in 12 cases, and the results showed an abnormal karyotype in seven cases (5 cases of Turner syndrome and 2 cases of trisomy 21). The mean size of CH was 5.4 cm. Other malformations or findings suggestive of the cause of fetal death were diagnosed in 10/18 cases (55.6%). The most common autopsy findings were hydrops and central nervous system anomalies. The autopsy findings were in agreement with the prenatal ultrasound findings in 13/18 cases (72.2%), while in five cases (27.8%) additional findings were detected during autopsy. The most common placental abnormalities were infarcts and calcifications. CONCLUSION: In addition to prenatal diagnostic studies, fetal autopsy and pathologic examination of fetal and placental tissues may help to establish the exact cause of death and disclose important information as to the presence of various fetal malformations or placental abnormalities.

Peritoneal mesotheliomas mimicking adnexal tumors. Clinicopathological characteristics of four cases and a short literature review.

Three cases of peritoneal benign cystic mesotheliomas in women 32-34 years of age and one case of peritoneal malignant mesothelioma in a 47-year-old woman are reported. All cases presented with abdominal discomfort and/or pain and the physical and radiological diagnostic methods showed adnexal tumors. The cystic mesotheliomas developed in the cul-de-sac and the right pelvic sidewall, presented as multiple small cysts or large multilocular cystic mass. The malignant mesothelioma showed extensive infiltration of the omentum the intestinal loops and the surface of the uterus and adnexa, with bilateral hydrosalpinx and ascites. All cases presented histological and immunohistochemical characteristics consistent with tumors of mesothelial origin. No history of asbestos exposure was reported. The correct diagnostic and therapeutic approaches to these neoplasms are discussed.

Clinicopathological features and immunoprofile of 30 cases of Brenner ovarian tumors.

AIM: The aim of this study was to investigate the clinicopathological and immunopathological features of Brenner ovarian tumors. MATERIALS AND METHODS: Thirty cases of Brenner ovarian tumors were examined in our laboratory among 1,680 cases of ovarian tumors, representing 1.5% of all tumors examined. Blocks of paraffin-embedded tumor tissue for all cases were available for additional immunohistochemical stain by a Ventana autoimmunostainer. Moreover, antibodies for Uroplakine III (cellmarque AU-1 clone, 1:25) Chromogen (monosan clone 5H7,1:25) WT1 (novocastra, clone 3F-H2, 1:25) NSE (DAKO, clone BB5/NC/V1-H14, 1:50), CK20 (DAKO, clone Ks20.8, 1:50),CK7 (Zymed 1:25, clone V-TL12/30)were used. RESULTS: The mean age of the patients was 51.4 years ranging from 16 to 82 years. The tumor was unilateral in 28 cases (16/28 in the right ovary and 12/28 in the left ovary) and bilateral in two cases. Twenty-eight cases (93%) were benign and two (7%) were proliferating (borderline) tumors. Seventeen cases (56%) were pure Brenner tumors, measuring from 0.5 to 2.5 cm and 13 cases (44%) were mixed tumors consisting of a Brenner tumor element and a mucinous ovarian tumor (10/13 cases, 53.8%) and a germ cell tumor in 3/13 cases. The largest diameter of the mixed tumors ranged from 7 to 22 cm. The largest area consisting of Brenner elements measured 7 cm. The immunoprofile of Brenner tumor cell was cytokeratine-7 positive (30/30 cases) cytokeratine-20 negative in the Brenner cell element but positive in the mucinous component in 5/7 cases of mixed Brenner tumors, focally WT-1 positive (5/30 cases), NSE negative (0/30 cases) and focally chromogranine positive (6/30 cases), Uroplakin-III positive in 23/30 cases, with faint cytoplasmatic or luminal distribution. In conclusion, Brenner ovarian tumors are unilateral, small and benign neoplasms in their majority and present specific histopathological and immunopathological characteristics and mixed forms with other epithelial and germ cell neoplasms. This could be explained as a form of metaplasia or a diverse histogenesis from surface epithelium and/or the germ cell ovarian component.

Single umbilical artery: fetal and placental histopathological analysis of 24 cases.

AIM: 24 cases of single umbilical artery (SUA) are presented and the related histopathological findings of the fetuses and placentas examined. SUA is the most common congenital anomaly of the umbilical cord, resulting in the absence of one of the two umbilical arteries. It has an incidence of approximately 2.1% in autopsy material and there is evidence that is associated with anomalies of the fetus and placenta. MATERIAL-METHOD: The files were reviewed of 24 cases with SUA, out of 1,570 autopsies of fetuses and placentas performed in the Pathology Laboratory of Aretaieion Hospital, due to spontaneous or induced abortions after written parental consent. RESULTS: The incidence of SUA was 1.6%. Gestational age ranged between the 15th and 33rd week and mother's age ranged from 17-44 years. Three of 24 cases were twin pregnancies; 17/24 fetuses were male. In 21/24 cases complex congenital anomalies were observed and in five of 24 cases chromosomal anomalies were detected. In eight of 24 placentas extensive infarcts were observed; 7/24 dysmaturity, 5/24 severe chorioamnionitis, 3/24 extensive fibrin accumulation and 1/24 chorioangiosis. CONCLUSION: SUA is an umbilical congenital anomaly associated with severe fetal congenital anomalies and once detected with ultrasound techniques, further and more detailed control of the fetus is considered mandatory.

Gossypiboma: a rare abdominal lesion of women after cesarean section, usually misdiagnosed as a neoplasm.

The case of a 20-year-old pregnant woman with a history of one previous cesarean section (CS) who developed a tumorous mass in the area of the CS scar is presented. The clinical diagnosis of endometriosis or fibromatosis was made but the histologic findings were confusing and the pathological diagnosis of an inflammatory type of liposarcoma was made. The case was referred to our Laboratory for re-evaluation and the diagnosis of gossypiboma was made based on histopathological features, the patient's age, her medical history and the exact location of the lesion. Gossypiboma is a foreign body-related inflammatory pseudotumor caused by retained non-resorbable or even resorbable substances, such as glue, surgical gause or sutures. It is an obscure lesion ignored by doctors of all specialties studying the differential diagnosis of a postoperative mass.

Angiomyofibroblastoma of the vulva: a clinicopathological and immunohistochemical analysis of a rare benign mesenchymal tumor.

Angiomyofibroblastoma is a rare benign distinctive mesenchymal tumor that occurs in the genital pelviperineal region, commonly the vulva and vagina. We report a case of angiomyofibroblastoma in a 42-year-old woman, presenting as a "cystic mass" located subcutaneously in the right labial area of the vulva. Recognition of this entity is based on specific histological and immunopathological features, and the correct treatment is important because of the aggressive behavior of other related mesenchymal tumors of the vulva and vagina, such as angiomyxoma and cellular angiofibroma.

Monodermal teratomas (struma ovarii). Clinicopathological characteristics of 11 cases and literature review.

During the last 15 years in the Pathology Laboratory of Aretaieion University Hospital, 256 cases of teratomas were examined and 11 cases (4.3%) presented characteristics of struma ovarii. Eight patients aged 19-34 years and four 41-74 years (median 41 years). One 74-year-old patient presented with virilization signs but pain and a pelvic mass were the most frequent symptoms. The tumors were unilateral in 9/11 cases, the size ranged from 5-17 cm, and they were compact or microcystic in 10/11 cases and cystic in one case. Histological pattern was microfollicular in 5/11 cases, solid in 3/11 cases, pseudoglandular in 2/11 cases, with focal clear and oxyphil cell changes, and infiltration of the fibrous wall in one case. Tumorectomy was performed in 9/11 cases and total hysterectomy with adnexa in two cases with large tumors (16-17 cm in diameter). Immunohistochemistry is useful in the recognition of struma in atypical cases. No malignant struma ovarii was observed in our cases. Tumorectomy is the appropriate therapeutic approach because of the benign nature of these tumors despite atypical histological features and the young age of the patients.