Skull Base Tumors and Scalp Masses

Diagnostic Considerations

• The American Academy of Neurological Surgeons recommends considering skull base tumors, including leiomyomas and angioleiomyomas, in the differential diagnosis of head masses, particularly those involving deeper structures 1, 2, 3, 4, 5

Management Approach

• The American College of Pathologists suggests focusing on patient age as the single most important demographic factor influencing the differential diagnosis of scalp masses 6, 7
• The American Association of Neurological Surgeons advises determining if the mass is superficial (scalp) versus deep (involving skull), as deep masses require neurosurgical evaluation 8
• The American College of Pathologists recommends assessing for multiplicity of lesions, which may suggest systemic conditions or metastatic disease 6, 7

Treatment and Pitfalls

• The American Academy of Neurological Surgeons warns against missing deep involvement and recommends always assessing whether the mass involves the skull, as this changes surgical planning and requires specialized expertise 8
• The American College of Surgeons suggests considering vascular lesions, which may require preoperative embolization to reduce bleeding risk if excision is planned 8

Rare Skull‑Base Tumors: Leiomyoma and Angioleiomyoma

Differential Diagnosis

• Leiomyomas and angioleiomyomas, although extremely rare in the cranial vault, should be considered in the differential diagnosis of skull‑base lesions [9][10]11.

Tumor Characteristics

• These benign smooth‑muscle tumors can be locally destructive and may attain a large size (up to approximately 7 cm) 10.