Journal of Pathology and Translational Medicine

Ectopic Epididymis in Testicular Appendices: Report of Two Cases.: Hyun Soo Kim, Gou Young Kim, Hyung Lae Lee, Youn Wha Kim, Sung Jig Lim; Korean J Pathol. 2011;45:S11-S14.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S11

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Abstract PDF: We report two cases of ectopic epididymal ducts and efferent ductules in the testicular appendices (TAs) of adult men with normally descended testes. In both cases, a sessile TA was incidentally found at the upper pole of the right testis during the scrotal hydrocelectomy. Microscopically, a few closely arranged tubules were detected within the TA. In the first case, the tubules were lined with a pseudostratified columnar epithelium with numerous, long microvilli, and were surrounded by a smooth muscle coat. In contrast, in the second case, the tubules had a wavy luminal surface, because ciliated columnar cells alternated with groups of cuboidal cells. In both cases, strong CD10 immunoreactivity was observed in the luminal border of the lining epithelium. Surgical pathologists should be aware of the presence of both ectopic epididymal ducts and efferent ductules that can occur in TAs, in order to avoid misinterpretation as transected, functional reproductive structures.

Smooth Muscle Hyperplasia of the Epididymis: Report of A Case and Review of the Literature.: Hyun Soo Kim, Ji Youn Sung, Gou Young Kim, Sung Jig Lim, Hyun Cheol Kim, Hyung Lae Lee; Korean J Pathol. 2009;43(2):177-181.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.2.177

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A 66-year-old man underwent surgery to remove an incidentally discovered non-tender intrascrotal mass. Ultrasonography revealed an irregular-margined, heterogeneous mass-like lesion in the epididymal tail. The mass was relatively well circumscribed but unencapsulated, irregular and firm; it consisted of expansile, increased smooth muscle fascicles originating from the epididymal muscular coat. Its cellular growth pattern lacked the cohesive, well-circumscribed proliferation pattern typical of a leiomyoma. A diagnosis of smooth muscle hyperplasia of the epididymis was made. Although ultrasonography is the imaging modality of choice for evaluating suspected intrascrotal masses, there are times when it cannot reliably identify the character of the masses and distinguish malignant from benign lesions. Ill-defined, solid extratesticular masses, that are ultrasonographically ambiguous, should be excised and confirmed histopathologically and smooth muscle hyperplasia of the epididymis should be included in the differential diagnosis of solid extratesticular masses.

Citations

Citations to this article as recorded by

Smooth muscle hyperplasia of the testicular adnexa: a clinicopathologic study of 12 cases
Fatimah Alruwaii, David J. Grignon, Muhammad T. Idrees
Human Pathology.2020; 99: 27. CrossRef
Hiperplasia muscular paratesticular (epididimaria) pseudotumoral. Descripción de 2 casos
Inmaculada Ruiz Molina, Vicente Cívico Amat, Beatriz Santiago Agredano
Medicina Clínica.2019; 152(5): e25. CrossRef
Pseudotumoral paratesticular (epididymal) muscle hyperplasia. Two case reports
InmaculadaRuiz Ruiz Molina, Vicente Cívico Amat, Beatriz Santiago Agredano
Medicina Clínica (English Edition).2019; 152(5): e25. CrossRef
Smooth muscle hyperplasia of the epididymis
O Blach, AM Pollock, D Douglas
Journal of Surgical Case Reports.2011; 2011(10): 10. CrossRef

A Diagnostically Challenging Case of an Infarcted Adenomatoid Tumor of the Epididymis.: Sunhee Chang, Sang Hwa Shim, Ji Eun Kwak, Mee Joo, Hanseong Kim, Je G Chi, Keon cheol Lee; Korean J Pathol. 2008;42(4):229-231.

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Abstract PDF: We describe a case of an infarcted adenomatoid tumor of the epididymis that was challenging to diagnose. A 20-year-old man presented with acute left scrotal pain. He was found to have a 2x1.5x1 cm tumor that was relatively well circumscribed on gross examination. There was a central necrotic area that exhibited gaping spaces and ghost outlines of epithelial cells. The periphery of the necrotic lesion showed focally viable adenomatoid tumor. The majority of the tissue adjacent to the necrosis consisted of granulation tissue, fibroblastic and myofibroblastic proliferation, and neutrophils. The fibroblasts and myofibroblasts showed plump nuclei, often with small nucleoli. No mitotic activity was present. The differential diagnosis for an infarcted adenomatoid tumor includes malignant mesothelioma, inflammatory myofibroblastic tumor, and inflammatory conditions. The key to diagnosing an infarcted adenomatoid tumor is to consider it in the differential diagnosis of any spindle cell tumor with necrosis occurring in the genital tract.

Secondary Oxalosis Involving the Epididymis.: Sangkyum Kim, Kwanggi Lee, Namhoon Cho; Korean J Pathol. 2008;42(2):100-102.

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Abstract PDF: Secondary oxalosis in the epididymis is a rare complication among patients who have undergone hemodialysis or peritoneal dialysis. This case report presents secondary oxalosis confirmed via a clinicoradiological-pathologic process-in combination with clinical symptoms, ultrasonographic findings, cytologic findings in urine, and surgical pathological diagnosis.

Papillary Cystadenoma of the Epididymis: Component of von Hippel-Lindau Syndrome: A case report.: Yi Keong Chun, Won Ae Lee, Shin Kwang Khang; Korean J Pathol. 1994;28(6):663-665.

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Abstract PDF: Papillary cystadenoma of the epididymis is a rare benign tumor that represents the epididymal component of von Hippel-Lindau Syndrome. A case of epididymal papillary cystadenoma is presented in a 36 years old man. He also had pancreatic cysts, the pancreatic component of von Hippel-Lindau syndrome. His younger brother, who died of intracranial hemorrhage at age 27, revealed hemangioblastoma of the cerebellum, angioma of the retina and renal cell carcinoma on radiologic studies. These findings suggest familial occurrence of von Hippel-Lindau syndrome.

Adenomatoid Mesothelioma of the Epididymis: A case report.: Youn Mee Kim, Yi Kyeong Chun, Hy Jae Cho, Il Hyang Ko; Korean J Pathol. 1993;27(4):387-391.

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Abstract PDF: Adenomatoid tumors are well-recognized neoplasms generally to be of mesothelial derivation. We experienced a case of an adenomatoid tumor of the tail of the epididymis in a 56-year-old male. Grossly the tumor was firm and whitish gray, and microscopically it consisted of glandular, cord-like, microcystic structures which were lined by flattened endothelial like to plump cuboidal cells. Immunohistochemical stains whowed positivity for keratin and negativity for facter VIII related antigen and carcinoembryonic antigen. Ultrastructually, there was many long microvilli projecting into the glandular lumina and intracytoplasmic luminal spaces, desmosomes, and prominent cytoplasmic tonofilaments. Those findings strongly support the mesothelial origin of the adenomatoid tumor especially in the glandular type. It also lead us to suggest that the term adenomatoid tumor should be remain in use for light microscopic diagnosis, and that the term adenomatoid mesothelioma should be applied when the mesothelial nature of an adenomatoid tumor is proven by electron microscopy and immunohistochemical stains.

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