PMC6416756_01
(a) T2-weighted image (sagittal section) showing the cystic swelling. (b) T1-weighted image with contrast showing no contrast enhancement. (c) FLAIR (coronal section) showing the presence of cystic swelling. (d) T1 (axial) showing cystic lesion on vertex
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F1
T1-weighted sequences [Figure 1b] showing no surrounding edema on fluid-attenuated inversion recovery (FLAIR) image [Figure 1c]. There was no contrast enhancement [Figure 1d]. This lesion was showing no diffusion restriction and no signal susceptibility on susceptibility weighted imaging sequence. The patient underwent complete surgical excision of the scalp lesion under general anesthesia.
(a) Low-power magnification showing squamous epithelium, adnexa, and sebaceous glands. (b) High-power magnification showing skin and adnexa
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F2
It was lined by typical squamous epithelium filled with clear fluid and white keratinaceous material [Figure 2a and b].