[Multiple glomus tumors].

Area of Science:

• Pathology
• Dermatology
• Vascular Biology

Background:

• Glomus tumors (glomangiomas) are benign neoplasms originating from glomus bodies, specialized arterio-venous anastomoses.
• Disseminated glomus tumors are rare, presenting a diagnostic challenge.
• Understanding the histological variants and cellular origin is crucial for accurate diagnosis.

Observation:

• Two patients with disseminated glomus tumors exhibiting the angiomatous histological type were reported.
• Glomus tumors are histologically linked to the arterio-venous anastomoses (organ of Hoyer-Grosser).
• The epithelioid and angiomatous types are key histological variants, potentially linked to arterial and venous segments, respectively.

Findings:

• Histological identification of glomus cells is diagnostic for glomus tumors.
• Ultrastructural analysis using electron microscopy definitively identified glomus cells as modified smooth muscle cells.
• Electron microscopy aids in differentiating glomus tumors from hemangiopericytomas, which can be histologically similar.

Implications:

• This study reinforces the understanding of glomus tumor origins and histological classification.
• Electron microscopy is a valuable tool for precise diagnosis and differential diagnosis of glomus tumors.
• Further research into the specific roles of modified smooth muscle cells in glomus tumorigenesis is warranted.