Scrotal peritoneal mesothelioma on PET/CT

Our plain-English summary of Scrotal peritoneal mesothelioma on PET/CT, by S. Ozguven, M. Aras, F. Dede, et al (Clinical Nuclear Medicine, 2014).

The study

• Authors: S. Ozguven, M. Aras, F. Dede, T. Ones, H.T. Turoglu
• Journal: Clinical Nuclear Medicine
• Published: 2014;39(12):1045-6
• Type of article: Case report
• Cited by: 9 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

Although malignant mesothelioma originating from the tunica vaginalis has been reported in the literature, direct invasion of malignant peritoneal mesothelioma to the scrotal cavity has not been described yet. Herein, we presented a diffuse malignant peritoneal mesothelioma extending inferiorly to the scrotum via inguinal canal detected on FDG PET/CT.

In plain English

This article was a case report, published as an "Interesting Image," about one 59-year-old man with diffuse malignant peritoneal mesothelioma, a cancer of the lining of the abdomen. He was sent for an initial staging FDG PET/CT scan after 2 months of abdominal swelling. The scan showed multiple deposits in the peritoneum that took up high amounts of the tracer, with nodular thickening of the peritoneum. The disease extended sideways into muscles outside the chest and abdomen, upward into the right side of the chest, and downward into the scrotum through the right inguinal canal (a passage in the groin). The scan showed no spread through the blood or lymphatic system. The authors stated that, to their knowledge, direct invasion of peritoneal mesothelioma into the scrotal cavity had not been reported before. They explained this spread by how a structure called the processus vaginalis develops before birth. They concluded that this route of spread from the abdomen to the scrotum must be kept in mind when staging the disease. The article did not describe any asbestos or other exposure history for this patient.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: case report (an 'Interesting Image' article) describing one patient's initial staging FDG PET/CT scan, done after a 2-month history of abdominal distension
• Who was studied: one 59-year-old male patient with diffuse malignant peritoneal mesothelioma
• Main results:
  • In this patient, PET/CT showed multiple hypermetabolic (high tracer uptake) peritoneal deposits with nodular peritoneal thickening, extending laterally to the extrathoracic and extra-abdominal muscles
  • In this patient, the disease also extended upward to the right hemithorax (right side of the chest) and downward to the scrotum via the right inguinal canal
  • In this patient, there were no hematogenous (blood-borne) or lymphatic metastases
  • In this patient, the staging scan showed direct invasion of the mesothelioma from the peritoneal cavity to the right scrotum via the inguinal canal
  • The authors stated that, to the best of their knowledge, direct invasion of peritoneal mesothelioma to the scrotal cavity had not been reported in the literature
  • The authors explained the direct spread to the scrotum by the embryological development of the processus vaginalis, which elongates through the abdominal wall into the scrotal folds
• The authors' conclusion: The authors concluded that, for accurate staging of malignant peritoneal mesothelioma, a route for metastatic spread from the abdominal cavity to the scrotum must be kept in mind

Topics

The National Library of Medicine indexes this study under subjects our site covers: Mesothelioma, Peritoneal mesothelioma.

Medical terms in this study, explained in our Lexicon: Peritoneal Mesothelioma, Malignant Mesothelioma, Tunica Vaginalis, Inguinal Canal.

Related studies

• Fibrous mesotheliomas (pseudofibroma) of the scrotal sac: a light and ultrastructural study — B. Benisch, B. Peison, et al. (1981)
• Paratesticular mesotheliomas — R.E. McDonald, A.L. Sago, et al. (1983)
• Sonography of intrascrotal adenomatoid tumor — W.C. Leonhardt, G.A. Gooding (1992)
• Paratesticular tumors. A clinicopathological study from a single tertiary hospital in North India — P.A.M. Paul, N. Calton, et al. (2021)
• Malignant mesothelioma of the tunica vaginalis: a atypical presentation of a rare scrotal tumour — M.C. Harris, C. Logan, et al. (2019)
• Cystic lymphangioma: an uncommon type of scrotal swelling — G. Ferguson (1954)

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