Acquired tufted angioma showing spontaneous regression

Area of Science:

• Dermatology
• Pathology
• Vascular Biology

Background:

• Tufted angioma is a rare benign vascular neoplasm.
• Acquired tufted angioma typically presents in adulthood.
• Differential diagnosis includes other vascular lesions and tumors.

Observation:

• A 62-year-old woman presented with multiple scattered reddish nodules on the neck and upper chest.
• The lesions were monitored over a 6-month period.
• Some nodules showed transient spontaneous regression, with one completely resolving.

Findings:

• Electron microscopy of tumor cells revealed the presence of Weibel-Palade bodies within the cytoplasm.
• Weibel-Palade bodies are characteristic of endothelial cells, supporting the vascular origin of the tumor.
• The observed spontaneous regression is an unusual feature for tufted angioma.

Implications:

• This case highlights the variable clinical course of acquired tufted angioma, including spontaneous regression.
• The presence of Weibel-Palade bodies confirms the endothelial origin.
• Further research may elucidate the mechanisms behind spontaneous regression in vascular tumors.