Infantile (desmoid type) fibromatosis with extensive ossification

Area of Science:

• Pediatric Pathology
• Skeletal System Neoplasms
• Soft Tissue Tumors

Background:

• Solitary congenital or infantile fibromatosis (desmoid-type) is a benign soft tissue tumor.
• It can be locally aggressive and is often mistaken for congenital fibrosarcoma or other malignant tumors.
• Wide local excision is the standard treatment.

Observation:

• This report details a rare case of ossifying solitary congenital fibromatosis.
• Ossification has not been previously documented in this specific type of fibromatosis.
• The case underscores the importance of accurate histological differentiation.

Findings:

• The presented case demonstrates ossification within a solitary congenital fibromatosis.
• Histological analysis is crucial for distinguishing this benign entity from malignant mimics.
• Differential diagnosis includes congenital fibrosarcoma and various osteosarcomas.

Implications:

• Recognizing ossification in congenital fibromatosis is vital for correct diagnosis and treatment planning.
• This finding expands the known histopathological spectrum of infantile fibromatosis.
• Accurate differentiation prevents misdiagnosis and inappropriate aggressive treatment for a benign condition.