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Review ArticleTeaching Case Studies

Sister Mary Joseph Nodule in Advanced Pancreatic Adenocarcinoma Identified on 18F-FDG PET/MRI

Ming Yang, Alix C. Hopp, Tanios S. Bekaii-Saab and Joseph M. Collins
Journal of Nuclear Medicine Technology December 2019, 47 (4) 341-342; DOI: https://doi.org/10.2967/jnmt.119.225961
Ming Yang
1Department of Radiology, Mayo Clinic, Scottsdale, Arizona; and
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Alix C. Hopp
1Department of Radiology, Mayo Clinic, Scottsdale, Arizona; and
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Tanios S. Bekaii-Saab
2Department of Hematology/Oncology, Mayo Clinic, Scottsdale, Arizona
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Joseph M. Collins
1Department of Radiology, Mayo Clinic, Scottsdale, Arizona; and
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Abstract

Sister Mary Joseph nodule is an umbilical metastatic lesion typically originating from gastrointestinal or gynecologic malignancies. In pancreatic cancer, Sister Mary Joseph nodule is a sign of advanced disease with an associated poor prognosis. 18F-FDG PET/MRI provides an imaging tool in the identification of Sister Mary Joseph nodule and helps to improve the staging of pancreatic cancer.

  • molecular imaging
  • oncology: pancreas
  • PET/MRI
  • pancreatic cancer
  • Sister Mary Joseph nodule

Sister Mary Joseph nodule refers to a metastatic lesion of the umbilicus, with the primary malignancy originating in the gastrointestinal or genitourinary system. Pancreatic cancer accounts for 7%–9% of the reported cases of Sister Mary Joseph nodule, with nearly 90% of tumors occurring at the pancreatic body and tail (1–2).

18F-FDG PET/CT has been used to detect Sister Mary Joseph nodule, given its excellent staging ability (3). Here, we describe a Sister Mary Joseph nodule in advanced pancreatic cancer discovered on 18F-FDG PET/MRI. Combining PET molecular imaging and diagnostic abdominal MRI information, PET/MRI is a powerful imaging tool in the diagnosis and staging of pancreatic cancer.

CASE REPORT

A 75-y-old man with biopsy-proven pancreatic adenocarcinoma had a rising serum level of the tumor biomarker carbohydrate antigen 19-9, at 41,154 U/mL, after 1 cycle of modified FOLFIRINOX chemotherapy (folinic acid, fluorouracil, irinotecan, and oxaliplatin). Diagnostic whole-body CT performed at an outside institution revealed a new liver metastasis in addition to the known primary pancreatic body tumor. Restaging hybrid 18F-FDG PET/MRI, including a torso PET/MRI survey scan and focused 1-bed-position contrast-enhanced diagnostic pancreatic PET/MRI, was performed to reassess the tumor burden. On both the torso PET/MRI survey and the focused diagnostic pancreatic PET/MR images, a 2.3-cm hypermetabolic lesion with an MRI signal pattern of a solid, enhancing mass was identified at the retroumbilical region (Figs. 1 and 2). In retrospect, this mass lesion was present on the abdominal CT image but was diagnosed as umbilical fungal infection. The patient had been on 6 wk of antifungal therapy for suspected periumbilical fungal infection, which had improved since the start of chemotherapy. An ultrasound-guided core-needle biopsy was performed and confirmed metastatic pancreatic adenocarcinoma of the umbilicus, also known as a Sister Mary Joseph nodule. On the basis of this proof of disseminated pancreatic cancer, FOLFIRINOX therapy was resumed.

FIGURE 1.
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FIGURE 1.

On torso PET/MRI survey, maximum-intensity-projection anterior (A) and lateral (B) views show tracer-avid lesion at umbilical region (red arrows) with SUVmax of 7.1 and primary pancreatic tumor (arrowheads) with SUVmax of 6.7. Two additional benign inflammatory lesions were noted bilaterally in lung bases (black arrows). Liver lesion with low 18F-FDG uptake was not discernable on maximum-intensity projections.

FIGURE 2.
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FIGURE 2.

(A–C) Focused abdominal PET/MRI demonstrates 2.3-cm lesion (arrows) with low T1 signal (A), intense enhancement on postcontrast image (B), and restricted diffusion on diffusion-weighted image (C). (D and E) Lesion exhibited intense tracer uptake on PET (D) and PET/MRI (E) images. (F) This lesion was initially diagnosed clinically as umbilical fungal infection and was overlooked on contrast-enhanced abdominal CT study obtained at another institution.

DISCUSSION

The Sister Mary Joseph nodule represents an umbilical metastatic lesion that typically originates from gastrointestinal and gynecologic malignancies. The most common primary sites are stomach (21%), ovary (18%), colon (12%), and pancreas (9%). Other sites of rarer primaries include uterus, biliary tree, breast, and lung (1–2). The condition was named for Sister Mary Joseph, the surgical assistant to Dr. William Mayo of Mayo Clinic. She first noticed the association between an umbilical nodule and advanced intraabdominal malignancies while preparing the patient’s skin before surgery.

The presence of the Sister Mary Joseph nodule is a sign of widespread abdominal or pelvic malignancy and usually indicates a poor prognosis (2). The tumor markers, including carbohydrate antigen 19-9, carcinoembryonic antigen, and carbohydrate antigen 125, should be examined. The mechanism of tumor spread to the umbilicus has been postulated as direct invasion from the peritoneum through hematogenous or lymphatic pathways or along the embryonic remnants of the ligamentum teres or umbilical ligaments (3–4). In addition to metastasis, the differential diagnosis of a neoplastic umbilical nodule includes primary carcinoma, endometriosis, hernia, and granuloma, among others (5).

To our knowledge, this is the first report of identification of a Sister Mary Joseph nodule using PET/MRI. 18F-FDG PET/MRI is superior to PET/CT in providing excellent soft-tissue delineation of the nodule on the conjunctive abdominal MRI.

CONCLUSION

18F-FDG PET/MRI is a novel imaging tool in the diagnosis and staging of pancreatic adenocarcinoma. It provides an easier target for biopsy to establish the diagnosis of widespread pancreatic cancer with umbilical metastasis.

DISCLOSURE

No potential conflict of interest relevant to this article was reported.

Footnotes

  • Published online Apr. 24, 2019.

REFERENCES

  1. 1.↵
    1. Yendluri V,
    2. Centeno B,
    3. Springett GM
    . Pancreatic cancer presenting as a Sister Mary Joseph’s nodule: case report and update of the literature. Pancreas. 2007;34:161–164.
    OpenUrlCrossRefPubMed
  2. 2.↵
    1. Chiang CH,
    2. Lin MH
    . Sister Mary Joseph nodule associated with pancreatic adenocarcinoma. J Formos Med Assoc. 2015;114:92–93.
    OpenUrl
  3. 3.↵
    1. Métivier D Jr.,
    2. Bonardel G,
    3. Rouquie D,
    4. et al
    . 18F-FDG PET/CT imaging of Sister Mary Joseph’s nodule. Clin Nucl Med. 2012;37:486–488.
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  4. 4.↵
    1. Inanir S,
    2. Oksuzoglu K
    . FDG PET/CT imaging of calcified Sister Mary Joseph nodule. Clin Nucl Med. 2016;41:e458–e459.
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  5. 5.↵
    1. Coll DM,
    2. Meyer JM,
    3. Mader M,
    4. et al
    . Imaging appearances of Sister Mary Joseph nodule. Br J Radiol. 1999;72:1230–1233.
    OpenUrlAbstract
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Journal of Nuclear Medicine Technology: 47 (4)
Journal of Nuclear Medicine Technology
Vol. 47, Issue 4
December 1, 2019
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Sister Mary Joseph Nodule in Advanced Pancreatic Adenocarcinoma Identified on 18F-FDG PET/MRI
Ming Yang, Alix C. Hopp, Tanios S. Bekaii-Saab, Joseph M. Collins
Journal of Nuclear Medicine Technology Dec 2019, 47 (4) 341-342; DOI: 10.2967/jnmt.119.225961

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Sister Mary Joseph Nodule in Advanced Pancreatic Adenocarcinoma Identified on 18F-FDG PET/MRI
Ming Yang, Alix C. Hopp, Tanios S. Bekaii-Saab, Joseph M. Collins
Journal of Nuclear Medicine Technology Dec 2019, 47 (4) 341-342; DOI: 10.2967/jnmt.119.225961
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Keywords

  • molecular imaging
  • Oncology: Pancreas
  • PET/MRI
  • Pancreatic cancer
  • Sister Mary Joseph nodule
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