Sister Mary Joseph nodule

Sister Mary Joseph nodule refers to a palpable nodule bulging into the umbilicus as a result of metastasis from a malignancy in the abdomen or pelvis. It is named after Sister Mary Joseph Dempsey, a surgical assistant to Dr. William J. Mayo, who first noted the clinical significance of this finding in the early 20th century. The presence of a Sister Mary Joseph nodule is a sign of advanced disease and poor prognosis.

Etiology

Sister Mary Joseph nodules result from the spread of cancer cells through lymphatic or hematogenous routes, or direct extension from organs close to the umbilicus. The most common primary sites include the stomach, colon, ovary, and pancreas. Less frequently, cancers of the bladder, kidney, and uterus may also lead to the development of these nodules.

Pathophysiology

The pathophysiology of Sister Mary Joseph nodules involves the metastatic spread of cancer cells to the umbilical region. This can occur through several mechanisms:

• Lymphatic spread: Cancer cells can travel through the lymphatic system and deposit in the lymph nodes and tissues around the umbilicus.
• Hematogenous spread: Cancer cells enter the bloodstream and are carried to the umbilical area, where they lodge and proliferate.
• Direct extension: Tumors located near the umbilicus can grow directly into the umbilical area.
• Peritoneal dissemination: Cancer cells can spread within the peritoneal cavity and implant in the umbilicus.

Clinical Presentation

Patients with a Sister Mary Joseph nodule typically present with a visible or palpable mass at the umbilicus. The nodule may be painful or tender to touch. Other symptoms may depend on the primary cancer site and can include weight loss, abdominal pain, and signs of gastrointestinal obstruction.

Diagnosis

The diagnosis of a Sister Mary Joseph nodule is primarily clinical, based on the presence of a characteristic nodule at the umbilicus. Imaging studies, such as CT scans or MRI, can help in assessing the extent of disease and identifying the primary cancer site. Biopsy of the nodule, followed by histopathological examination, is essential for confirming the diagnosis and determining the origin of the metastatic cells.

Treatment

Treatment of Sister Mary Joseph nodules focuses on managing the underlying malignancy. Options may include surgery, chemotherapy, radiation therapy, or palliative care, depending on the type and stage of the primary cancer, as well as the patient's overall health status.

Prognosis

The prognosis for patients with Sister Mary Joseph nodules is generally poor, as their presence indicates advanced disease. Survival rates vary depending on the primary cancer type and the extent of metastasis.

Conclusion

Sister Mary Joseph nodules are a rare but significant clinical finding, indicative of advanced abdominal or pelvic malignancy. Early recognition and diagnosis are crucial for appropriate management, although the overall prognosis remains unfavorable.

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