BMJ Case Reports 2018; doi:10.1136/bcr-2017-223787
  • Rare disease

Borderline Mucinous Testicular Tumour: Diagnostic and Management difficulties

  1. Rachel Esler1
  1. 1 Department of Urology, Royal Brisbane and Women’s Hospital, Herston, Queensland, Australia
  2. 2 University of Queensland School of Medicine, Herston, Queensland, Australia
  3. 3 Department of Pathology, Royal Brisbane and Women’s Hospital, Herston, Queensland, Australia
  1. Correspondence to Dr Marlon Perera, marlonlperera{at}
  • Accepted 20 September 2018
  • Published 3 October 2018


A 45-year-old man presented with right-sided testicular swelling and pain. An examination found a tender, firm right testis, a clinically normal left testis and no palpable lymphadenopathy. Tumour and inflammatory markers were within normal limits. A scrotal ultrasound scan showed an intratesticular, avascular lesion measuring 4.4×2.6×1.8 cm. A CT scan of his chest/abdomen/pelvis (CT C/A/P) showed no metastatic or primary lesions. An elective right-inguinal orchidectomy was subsequently performed. Histopathology showed a cystic mucinous tumour lined with intestinal-type epithelium. Differentials of metastatic adenocarcinoma, possibly of a gastrointestinal origin, a monodermal teratoma, or a borderline mucinous tumour of the testicle (BMTT) were considered. Following 12 p genetic studies and a colonoscopy, both of which found no abnormalities, a presumptive diagnosis of a BMTT was made. The patient is to have an annual urological review with a CT C/A/P and 5 yearly colonoscopies.


  • Contributors KP: data collection, manuscript preparation MP: manuscript preparation FM: data collection RE: project supervision, primary clinician.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent Obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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