Intestinal-type mucinous ovarian carcinoma arising from a seromucinous precursor lesion.

OBJECTIVE: Mucinous ovarian carcinoma is a tumor with gastrointestinal differentiation, which is not associated with endometrial-type (endometriotic or seromucinous) precursors. Here, we describe a peculiar case of mucinous ovarian tumor with intestinal differentiation arising in a seromucinous lesion, which may represent a distinct entity. CASE PRESENTATION: A 58-year woman underwent surgery due to a 14.5-cm ovarian mass with lymph nodal, peritoneal, omental and colorectal involvement. Histological examination with ancillary immunohistochemical analysis has been performed. Histologically, the mass was a carcinoma with intestinal differentiation and expansile growth pattern, arising in a seromucinous cystadenoma with intestinal metaplasia. Both the carcinoma and the metaplasia showed loss of Müllerian markers (estrogen and progesterone receptors, PAX8) and positivity for intestinal-type markers (cytokeratin 20, CDX2). CONCLUSIONS: Our case may represent the ovarian counterpart of endometrial gastrointestinal-type carcinoma, which is an aggressive entity developing from gastrointestinal metaplasia of the endometrial epithelium. Acknowledging the existence of such entity might be relevant in terms of diagnosis and patient management.

When a mimicker wears strange faces: description of an osteogenic melanoma arising within an ovarian teratoma with focus on its late peritoneal relapse.

Secondary malignancies arising within mature teratomas are a rare event, originating from malignant transformation of the tissues derived from one of the three germ cell layers. Osteogenic melanoma is exceedingly rare histologic variant of malignant melanoma, in which the melanoma is associated to an osteogenic sarcoma component. To the best of our knowledge, first case of osteogenic melanoma arising within mature ovarian teratoma in a 30-year-old woman without evidence of a primary cutaneous or visceral melanoma. The present case showed an unusual morphological and immunohistochemical pattern and was incorrectly diagnosed as undifferentiated carcinoma. After a 15 years follow-up period, the patient presented a peritoneal recurrence histologically constituted by epithelioid cells with prominent osteoid formation and with immunohistochemical expression of melanocytic markers (S100, HMB-45). Heterozygote Mutation V600E/E complex has been detected in the BRAF exon 15 sequence. The case was then interpreted as osteogenic melanoma. The present case contributes to widen the spectrum of neoplasms derived from malignant transformation of ovarian teratomas and provides also new insights about the clinical behavior of osteogenic melanoma when arising outside its usual anatomical location.

Frozen section accurately allows pathological characterization of endometrial cancer in patients with a preoperative ambiguous or inconclusive diagnoses: our experience.

BACKGROUND: The aim of this study was to assess the agreement rate between intraoperative evaluation (IOE) and final diagnosis (FD) in a series of surgically resected endometrial carcinoma (EC), with a preoperative ambiguous or inconclusive diagnosis by endometrial biopsies and imaging. METHODS: A retrospective study was performed selecting patients who underwent surgery with IOE for suspected EC at our institution from 2012 to 2018. A K coefficient was determined with respect to the histotype, tumor grade, myometrial infiltration and cervical involvement. RESULTS: Data analysis has been performed on 202 women. The IOE evaluation was distributed as Endometrioid (n = 180) and Non-Endometrioid (n = 22). The comparison between the frozen section (FS) and the definitive histological subtype showed an overall agreement rate of 93,07% (k = 0.612) and an agreement of 97.2% for Endometrioid vs 59% for Non-Endometrioid tumors. The FIGO system grading was the same in 91,1% of patients, none was upgraded and in 8,9% downgraded. Observed agreements were 89,11% and 95,54% for myometrial and cervical involvement, respectively. CONCLUSIONS: The good agreement between intraoperative grading, myometrial invasion and their histological definition on permanent sections highlights that FS is a good predictor for surgical outcome, in particular in presence of a preoperative ambiguous or inconclusive diagnostic evaluation.

Hemangioma of the umbilical cord with associated amnionic inclusion cyst: two uncommon entities occurring simultaneously.

This corrects the article DOI: 10.32074/1591-951X-26-17.

Hemangioma of the umbilical cord with associated amnionic inclusion cyst: two uncommon entities occurring simultaneously.

Umbilical cord hemangioma is an uncommon benign vascular neoplasm arising from the free segment of the umbilical cord, distinct from placental and fetal insertion, and is thought to originate from endothelial cells of the umbilical vessels. Cystic changes in the umbilical cord rarely occur as a consequence of the damage to the amnionic surface of the cord caused by the presence of the hemangioma. Until now, a total of 8 cases of umbilical cord hemangioma associated with cystic changes in the umbilical cord have been reported in the literature, however, among these cases, only one showed an associated cyst derived from inclusion of the amniotic epithelium, and the remaining seven cases consisted of hemangiomas with associated pseudocyst of the umbilical cord. We herein report a case of umbilical cord hemangioma with an associated amnionic epithelial inclusion cyst. Clinicopathological features and differential diagnostic considerations are also discussed.

Imaging in gynecological disease (16): clinical and ultrasound characteristics of serous cystadenofibromas in adnexa.

OBJECTIVE: To describe the clinical and ultrasound characteristics of serous cystadenofibromas in the adnexa. METHODS: This was a retrospective study of patients identified in the International Ovarian Tumor Analysis (IOTA) database, who had a histological diagnosis of serous cystadenofibroma and had undergone preoperative ultrasound examination by an experienced ultrasound examiner, between 1999 and 2012. In the IOTA database, which contains data collected prospectively, the tumors were described using the terms and definitions of the IOTA group. In addition, three authors reviewed, first independently and then together, ultrasound images of serous cystadenofibromas and described them using pattern recognition. RESULTS: We identified 233 women with a histological diagnosis of serous cystadenofibroma. In the IOTA database, most cystadenofibromas (67.4%; 157/233) were described as containing solid components but 19.3% (45/233) were described as multilocular cysts and 13.3% (31/233) as unilocular cysts. Papillary projections were described in 52.4% (122/233) of the cystadenofibromas. In 79.5% (97/122) of the cysts with papillary projections, color Doppler signals were absent in the papillary projections. Most cystadenofibromas (83.7%; 195/233) manifested no or minimal color Doppler signals. On retrospective analysis of 201 ultrasound images of serous cystadenofibromas, using pattern recognition, 10 major types of ultrasound appearance were identified. The most common pattern was a unilocular solid cyst with one or more papillary projections, but no other solid components (25.9%; 52/201). The second most common pattern was a multilocular solid mass with small solid component(s), but no papillary projections (19.4%; 39/201). The third and fourth most common patterns were multi- or bilocular cyst (16.9%; 34/201) and unilocular cyst (11.9%; 24/201). Using pattern recognition, shadowing was identified in 39.8% (80/201) of the tumors, and microcystic appearance of the papillary projections was observed in 34 (38.6%) of the 88 tumors containing papillary projections. CONCLUSIONS: The ultrasound features of serous cystadenofibromas vary. The most common pattern is a unilocular solid cyst with one or more papillary projections but no other solid components, with absent color Doppler signals. Most serous cystadenofibromas were poorly vascularized on color Doppler examination and many manifested acoustic shadowing. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.

Imaging in gynecological disease (11): clinical and ultrasound features of mucinous ovarian tumors.

OBJECTIVE: To describe the clinical and ultrasound findings in patients with mucinous ovarian tumors. METHODS: In this retrospective study, women with a histological diagnosis of mucinous ovarian tumor who had undergone preoperative ultrasound examination were identified from the database of a single ultrasound center. The histological examination was performed by the same pathologist in all cases, and the ultrasound appearance of the tumors was described using the terms and definitions of the International Ovarian Tumor Analysis group. RESULTS: We identified 123 women with a histological diagnosis of mucinous ovarian tumor, of whom 57 (46%) had benign cystadenoma, 34 (28%) had gastrointestinal (GI)-type borderline tumor, 10 (8%) had endocervical-type borderline tumor and 22 (18%) had GI-type invasive carcinoma. On ultrasound examination, 65% (37/57) of cystadenomas were multilocular, of which 59% had ≤ 10 locules, and 79% (27/34) of GI-type borderline tumors were multilocular, of which 89% had > 10 locules. Conversely, 60% (6/10) of endocervical-type borderline tumors had papillations. Eighty-two percent (18/22) of invasive masses contained solid components and 55% (12/22) were multilocular-solid cysts. Bilateral mucinous cystadenomas were found in two women (4% of women with benign tumors) and bilateral borderline tumors of endocervical type in two women (20% of women with borderline tumors of endocervical type). No woman had a bilateral GI-type borderline tumor or a bilateral invasive tumor. CONCLUSIONS: A multilocular cyst with 2-10 locules is representative of a benign cystadenoma, whereas a multilocular cyst with > 10 locules is indicative of a GI-type borderline tumor. Most invasive tumors of mucinous GI-type contain solid components, the most typical ultrasound appearance being that of a multilocular-solid tumor. Papillary projections are typical features of endocervical-type borderline tumors. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.