Ureteral cancer associated with dermatomyositis

Area of Science:

• Internal Medicine
• Oncology
• Rheumatology

Background:

• Dermatomyositis is a rare idiopathic inflammatory myopathy characterized by distinct skin manifestations and muscle weakness.
• While associations with various cancers exist, genitourinary malignancies are infrequently reported in dermatomyositis patients.

Observation:

• A 42-year-old male presented with a characteristic rash, muscle weakness, and elevated inflammatory markers, leading to a dermatomyositis diagnosis.
• Investigations for an underlying malignancy revealed microscopic hematuria and abnormal urine cytology.
• Imaging and biopsy confirmed urothelial carcinoma of the right mid-ureter.

Findings:

• This case represents the first documented instance of ureteral cancer associated with dermatomyositis.
• The patient's condition was complicated by interstitial lung disease, a known poor prognostic factor in dermatomyositis.
• Despite recommendations for surgical intervention, the patient succumbed to pneumonia secondary to his lung disease.

Implications:

• This case underscores the importance of investigating for malignancy, particularly genitourinary cancers, in patients diagnosed with dermatomyositis.
• Further research is warranted to elucidate the potential pathophysiological links between dermatomyositis and urothelial carcinoma.
• Early detection and management strategies may be crucial for improving outcomes in this rare patient cohort.