Extragastrointestinal stromal tumor presenting as an exophytic prostatic mass

Area of Science:

• Oncology
• Gastroenterology
• Urology

Background:

• Extragastrointestinal stromal tumors (EGISTs) are rare mesenchymal neoplasms distinct from their gastrointestinal counterparts.
• EGISTs originate from ectopic cells of Cajal, commonly found in the omentum, mesentery, and retroperitoneum.
• Prostatic EGISTs are exceptionally rare, with prior reports describing tumors confined within the prostate gland.

Observation:

• A 66-year-old male presented with a large, exophytic mass originating from the prostate.
• The mass was identified as an extragastrointestinal stromal tumor (EGIST).
• This presentation is unusual as the tumor was exophytic rather than endophytic.

Findings:

• The prostatic mass was diagnosed as an extragastrointestinal stromal tumor (EGIST).
• The tumor exhibited an exophytic growth pattern, extending outward from the prostate.
• This case represents a rare occurrence of a prostatic EGIST with an exophytic morphology.

Implications:

• This case expands the known spectrum of EGIST presentation, particularly in the prostate.
• Recognizing exophytic EGISTs is crucial for accurate diagnosis and appropriate management.
• Further research into the behavior and origin of prostatic EGISTs is warranted.