Incidence Of Unexpected Malignancy Research Articles

Incidence and Predictors of Unexpected Malignancy in Benign Myomectomy or Hysterectomy.

Introduction Detection of gynecological cancers preoperatively is imperative for practitioners for optimal patient management and outcome. This study aimed to estimate the incidence of unexpected malignancy (UM) in patients who underwent hysterectomy or myomectomy for presumed benign indications and to detect the predictive factors of UM. Methods A retrospective analytical study that included patients who underwent hysterectomy or myomectomy for benign indications from January 1st, 2016, to December 31st, 2020, was conducted at the Department of Obstetrics and Gynecology at Salmaniya Medical Complex, Bahrain. The main outcome was the overall incidence of UM and the incidence of each malignancy. Characteristics of UM were compared with benign pathologies. Fisher's exact and Pearson's chi-square tests were used to compare categorical variables and the Mann-Whitney U test or student's t-test for continuous variables. Binary logistic regression was used to identify the predictors of occurrence of UM. Confidence interval (CI) was set at 95%. A probability value (p-value) less than 0.05 was considered statistically significant. Results Out of 513 patients who underwent hysterectomy or myomectomy, 379 (73.9%) fulfilled the inclusion criteria,314 (82.8%) hysterectomies and 65 (17.2%) myomectomies. The overall incidence of UM was 1.3% (n=5/379), 1.3% (n=4/314) among hysterectomiesand 1.5% (n=1/65) among myomectomies. Three (0.8%) pre-malignant pathologies were identified: one (0.26%) smooth muscle tumor of unknown malignant potential, leiomyoma with bizarre nuclei, and mucinous borderline tumor of endocervical type of ovary each. The types of UM were sarcomas in three (0.26%) patients (two (0.5%) leiomyosarcomaand one (0.26%) endometrial stromal sarcoma)and endometrial adenocarcinomaand ovarian cancer in one (0.26%) patient each. No significant difference was found between the characteristics of UM and benign pathologies. Conclusion Although this study demonstrated a low incidence of UMamong both hysterectomiesandmyomectomies, theage at the diagnosis of our patients with UM was as young as34 years of age, and sarcomas were the most common type of UM. Disconcertingly, none of the studied independent variables had significantly predicted the occurrence of UM.

Incidence of occult malignancies identified during hysterectomies performed for benign indications

ObjectiveHysterectomy is a commonly performed gynaecological procedure worldwide. Although most hysterectomies are performed for benign indications, the possibility of an unexpected malignancy in the final pathology results should be considered. The aim of our study was to investigate the evaluation and management of patients who underwent hysterectomy for benign reasons but were diagnosed with a malignancy in the final pathology results. MethodsWe retrospectively examined the medical records of patients who underwent hysterectomy for benign indications between 2011 and 2017, and recorded the information obtained from these patient files. ResultsIn total, 1050 patients who underwent hysterectomy for benign indications were included in the study. Among these patients, 127 underwent hysterectomy for uterine prolapse, 230 for uterine myoma, 223 for treatment-resistant menometrorrhagia, 150 for treatment-resistant menometrorrhagia and uterine myoma, 61 for endometriosis, 108 for ovarian cysts, 45 for endometrial polyps, and 106 for treatment-resistant menometrorrhagia and ovarian cysts. In 13 of these patients, malignancy was unexpectedly identified via the final pathology results. Seven of these patients had sarcoma, three had cervical cancer, two had ovarian cancer, and one had metastasis of a haematological malignancy. ConclusionMalignancy was identified in 13 of the 1050 patients included in our study. The incidence of unexpected malignancy in these patients who underwent hysterectomies performed for benign indications was determined to be 1.23%. Seven of these 13 patients had sarcoma. Our results demonstrate the absence of reliable data for preoperative detection of sarcoma.

Morcellating uterine mesenchymal tumors: The pathologist's view.

The study was conducted to delineate the histological problems in diagnosing uterine mesenchymal tumors in morcellated material. All cases of morcellated uteri performed between 2008 and 2014 were reviewed. The incidence of unexpected malignancy, defined as any neoplasm with a clear-cut diagnosis of leiomyosarcoma (LMS) or endometrial stromal sarcoma (ESS), was noted. Cases with absolute discrepancy between the diagnosis of the morcellated tumor and the subsequent diagnosis were also included in the study. Out of 631 cases, a final diagnosis of LMS or ESS was made regarding three and five tumors, respectively. Patient age ranged from 25 to 48 years. Two further cases initially diagnosed as ESS proved to be endometrial stromal nodules with smooth muscle differentiation. Two cases were diagnosed as smooth muscle tumors with uncertain malignant potential and the patients remain free of disease. One tumor was diagnosed as an endometrial stromal neoplasm and proved to be benign and finally a leiomyoma variant presented with presumed peritoneal disease. Both endometrial stromal and smooth muscle tumors with malignant behavior can be encountered at a young age. Because of the limitations in histological evaluation, morcellated tumors may be overdiagnosed or underdiagnosed by pathologists.

Does the incidence of unexpected malignancy in ‘benign’ rectal neoplasms undergoing trans‐anal endoscopic microsurgery vary according to lesion morphology?

Mucosectomy by trans-anal endoscopic microsurgery (TEMS) allows safe and effective excision of benign rectal lesions. Preoperative endoscopic, clinical and ultrasonographic assessment aims to select benign lesions whilst avoiding inappropriate mucosectomy in lesions with malignancy. This study examines the relationship between lesion morphology and accurate benign preoperative classification of rectal lesions undergoing TEMS. Primary lesions preoperatively assessed as benign were identified from a prospective TEMS database. Operative specimen morphology was independently classified by two blinded investigators, using photographs, into flat-sessile, exophytic or mixed morphology. The accuracy of the preoperative assessment by rectal ultrasonography was compared with the results of histological examination of the excised specimen (χ(2) and Fisher's exact tests). Of 167 lesions with adequate data, the morphological classification showed 60 flat-sessile, 56 mixed morphology and 51 exophytic tumours, of which 5, 7 and 9, respectively, contained unexpected malignancy (P=0.48). Accurate preoperative assessment of a lesion as benign occurred in 89% of flat-sessile and mixed morphology (n=55 and 49, respectively) and in 70% of exophytic lesions (n=36) (P=0.01). Only the exophytic group contained patients in whom preoperative endoscopic and ultrasonographic staging could not be confidently made (uTx). Histology demonstrated six of the seven uTx cases to be benign. In this study exophytic polyps were less likely to be accurately classified as benign using preoperative ultrasonography/endoscopy when compared with flat-sessile or mixed morphology polyps.

Transanal Endoscopic Microsurgery in Small, Large, and Giant Rectal Adenomas

OBJECTIVE To assess the outcomes of transanal endoscopic microsurgery in small (<3 cm), large (3-5 cm), and giant (>5 cm) lesions and compare these with reports of alternative techniques. DESIGN Data from January 1998 to February 2010 were prospectively collected. Lesions were divided into 3 groups according to the maximum diameter (group A, <3 cm; group B, 3-5 cm; and group C, >5 cm) and outcomes were analyzed separately. SETTING Colorectal unit in a single-district general hospital. PATIENTS Patients diagnosed as having benign rectal adenomas. INTERVENTION Transanal endoscopic microsurgery excision. MAIN OUTCOME MEASURES Completion of excision (R0), en bloc and full-thickness excisions, complication and local recurrence rates, and disease-free survival. RESULTS A total of 320 lesions were analyzed. Overall en bloc and full-thickness excision rates were 99% and 80.7%, respectively. In the 279 benign lesions, the R0 rate was 90.3%. Outcomes for groups A, B, and C were, respectively: 9.3%, 12.8%, and 14.4% incidence of unexpected malignancy (P=.64); 95.9%, 92.2%, and 85.1% R0 resection for benign lesions (P=.19); and 7.4%, 14.9%, and 24.6% complication rates (P<.05). Overall operative mortality was 1 of 320 (0.3%). In group C, there was a higher estimated recurrence rate, therefore a lower disease-free survival than groups A and B; this difference was significant 40 months after surgery. Recurrences were associated with closeness to dentate line and advanced age (univariate analysis) and R1 resection (Cox regression). CONCLUSIONS Outcomes of transanal endoscopic microsurgery on large rectal lesions compared favorably with literature reports of alternative techniques. Postoperative complications and recurrences increased significantly with lesions larger than 5 cm.

Incidence of unexpected malignancies in routine tonsillectomy specimens in children.

Controversy continues to exist regarding the necessity to routinely send for histologic examination those specimens obtained after tonsillectomy with or without adenoidectomy in children. Otolaryngologists fear missing an unsuspected diagnosis, such as a tonsil malignancy. However, given the rare incidence of this event, the cost-effectiveness ratio of routine microscopic analysis is questionable. The purpose of this study was to assess the incidence of clinically relevant unexpected diagnosis among children who underwent tonsillectomy with or without adenoidectomy in our units and to review current available series on this topic. Retrospective study and review. All patients aged less than 16 years who underwent routine tonsillectomy (with or without adenoidectomy) at San Gerardo Hospital, Monza, Italy from January 1994 to June 2002 were reviewed. Histologic examination is routinely performed in our units. Patients were excluded if the primary indication for surgery was to rule out a tonsil malignancy. One thousand one hundred twenty-three (1,123) patients were recruited. Two cases of non-Hodgkin's lymphoma were detected, corresponding to a rate of 0.18% (95% confidence interval [CI] 0.07-0.56). Three previously published series were identified. The reported incidences of unexpected clinically relevant diagnoses varied between 0.0% and 0.05%. The results of our study highlight that the incidence of unexpected clinically relevant diseases of the tonsil in pediatric patients is low, albeit not extremely rare. This finding could be used to perform a cost-effectiveness analysis.