Adenomatoid tumor of ejaculatory duct

Case Report: Mucinous Adenocarcinoma Arising From Congenital Ejaculatory Duct Cyst

Herein we present a previously unreported rare case of mucinous adenocarcinoma arising from a congenital ejaculatory duct cyst. Radiographic and endoscopic examinations revealed the tumor occurred in a cyst running through the prostate. Initially, the immunohistochemical pathology results showed that it was a metastatic mucinous adenocarcinoma, but no other primary lesions were clinically evidenced. Based on the embryonic development process of the male urogenital tract, the malformation of the patient's ejaculatory duct, and the pathological examination of the resected specimen, we considered the tumor to be a primary mucinous adenocarcinoma which originating from the hypoplastic ejaculatory duct. The tumor may have developed from the foci of intestinal metaplasia from cloacal remnants during embryonic development.

Adenomatoid tumour of testis

Adenomatoid tumour is a rare neoplasm of mesothelial origin commonly seen in male and female genital tract. In this case report, the authors present a case of adenomatoid tumour in a 35-year-old male who presented with 1-year history of scrotal swelling. A clinical diagnosis of testicular neoplasm was made but final diagnosis of adenomatoid tumour was made after excisional biopsy.

Adenomatoid tumor of epididymidis: A case report

Background

Adenomatoid tumors are regarded as distinctive benign mesothelial neoplasms of the paratesticular region, most commonly occuring at the tail of the epididymidis.

Because of its rarity, the clinical and histopathological aspects are discussed.

Case presentation

We present the case of a 41-year-old patient with an adenomatoid tumour located in the tail of the left epididymis that referred to our department with gradual enlarged intrascrotal mass. The diagnosis was achieved by echography, and was confirmed by surgical excision and histological analysis.

Conclusion

Due to its low incidence in intrascrotal pathology, we believe it is important for the physician to be aware of this interesting entity in order to make a differential diagnosis from other inflammatory processes and to adopt the proper surgical approach.

Extragenital adenomatoid tumor of a mediastinal lymph node

Adenomatoid tumors are benign neoplasms found predominantly in male and female genital tracts. Rare extragenital adenomatoid tumors have been discovered that involve serosal surfaces and nonmesothelial-lined organs such as adrenal glands. Since the discovery of adenomatoid tumors, their histogenetic origin has been debated. Many researchers support a mesothelial cell origin for adenomatoid tumors because these tumors characteristically express a mesothelial phenotype. Tumor derivation from primitive pluripotent mesenchymal cells and coelomic epithelium also has been suggested because of the anatomical distribution of the tumors. Despite their characteristic mesothelial phenotype and histological appearance, adenomatoid tumors have an extensive differential diagnosis that includes vascular neoplasms, malignant mesothelioma, germ cell tumors, and metastatic adenocarcinoma. Recognition of these tumors may be especially difficult when examined at frozen section and when adenomatoid tumors are encountered in rare extragenital sites. We describe an adenomatoid tumor of a mediastinal lymph node that was found incidentally during a redo Collis-Nissen gastroplasty. On frozen section examination, this tumor was misinterpreted as metastatic adenocarcinoma. The hematoxylin-eosin histological, immunohistochemical, and ultrastructural studies confirmed the mesothelial phenotype of this tumor. To our knowledge, this is the first description of a lymph node adenomatoid tumor.

Adenomatoid tumors of testis and epididymis: a report of two cases

Adenomatoid tumors are rare benign tumors of female and male genital tracts. In this paper, we reported an epididymal and a testicular adenomatoid tumor in two patients presented with enlarged intrascrotal mass.

Adenomatoid tumor of the genital tract: evidence of mesenchymal cell origin

The objective of this study was to re-examine the histogenesis of adenomatoid tumors. This benign neoplasm is characterized by gland-like structures with a pseudodinfiltrative pattern, usually involving fibromuscular tissue at a certain distance from an overlying surface mesothelium. Twenty cases of adenomatoid tumors and four cases of reactive submesothelial lesions, characterized by marked proliferation of subserosal mesenchymal cells, were reviewed. Nineteen of twenty adenomatoid tumors, including lesions with ill-defined borders, showed no connection with surface mesothelium. At the periphery of small tumors, isolated glands, clusters of epithelioid cells and single epithelioid, and spindled cells showing no connection to adjacent glands or cell clusters were identified. The tumor cells shared features with reactive subserosal stromal cells including an infiltrative pattern and histochemical and immunohistochemical properties. The differences between adenomatoid tumors and reactive submesothelial tissue are quantitative in nature: predominant amount of spindled cells in reactive submesothelial lesions, and predominant amount of gland-like structures in adenomatoid tumors. It is proposed that adenomatoid tumors arise from pluripotent mesenchymal cells that differentiate toward submesothelial cells and eventually mesothelial cells. This differentiation is probably induced by the adjacent submesothelial cells.

Intrascrotal adenomatoid tumors and their ultrasound findings

Adenomatoid tumors are regarded as uncommon neoplasms of the paratesticular tissues, probably of mesothelial origin, and the majority of cases reported have involved the epididymis. Ultrasonography is the method of choice for imaging scrotal pathology, but there are very few data on ultrasound findings in cases of adenomatoid tumors. We report our experience and ultrasound findings regarding 8 intrascrotal adenomatoid tumors--3 cases of a testicular tunica albuginea tumor and 5 cases of epididymal origin. Ultrasonography is recommended as the preoperative imaging method for excluding the possibility of a cystic lesion and for determining the location of the tumor. Local excision is regarded as the treatment of choice. The clinical course of all these tumors was benign, without recurrences.

Intrascrotal adenomatoid tumors

Adenomatoid tumors are regarded as uncommon neoplasms of the paratesticular tissues, probably of mesothelial origin. The majority of cases reported have involved the epididymis. We report our experience with 8 cases of testicular tumors and 11 of epididymal adenomatoid tumors during a 13-year period, and review the relevant literature. The incidence of adenomatoid tumors relative to all tumors in the testis was 6.9% (8 of 116), exceeding that of Leydig cell tumors, which were previously believed to be the most common benign testicular neoplasms. The adenomatoid tumors included 38% epididymal tumors (11 of 29). The clinical course of the tumors was benign, without recurrences. Local excision is regarded as the treatment of choice for epididymal and testicular adenomatoid tumors.

Adenomatoid tumor of testicular tunica albuginea mimicking testicular carcinoma

Adenomatoid tumors are an uncommon neoplasm of the paratesticular tissues, with the majority of the reported cases involving the epididymis. A case is reported of an adenomatoid tumor of the testicular tunica albuginea that masqueraded as testicular carcinoma.