The hot skull: malignant or feminine?

Area of Science:

• Nuclear Medicine
• Oncology
• Radiology

Background:

• Diffusely increased radiotracer uptake in the skull, termed "hot skull," is commonly associated with bone metastases and metabolic disorders.
• The prevalence and specific associations of the hot skull, particularly with malignancy, require further investigation.

Purpose of the Study:

• To determine the prevalence of the hot skull in a patient cohort.
• To investigate the relationship between the hot skull and malignancy, specifically breast carcinoma.
• To explore the hot skull as a potential normal variant in females.

Main Methods:

• Retrospective analysis of bone scintigraphy findings in 673 patients.
• Correlation of "hot skull" findings with clinical data, including malignancy status and sex.

Main Results:

• The "hot skull" was found to be significantly more prevalent in women than men.
• In female patients, "hot skull" demonstrated a clear association with malignancy, and a lesser association with breast carcinoma.
• The data suggest "hot skull" may represent a normal physiological variant in the female population.

Conclusions:

• The "hot skull" finding in women is associated with malignancy but also shows a higher prevalence in females, suggesting it could be a normal variant.
• The "hot skull" lacks clinical utility in screening protocols due to its potential as a normal variant and its association with various conditions beyond specific malignancies.