Meeting abstract
Dermoid cyst… with an unexpected twist: a case report
Barbara Dawidowsky
; Klinika za dječje bolesti, Klaićeva 16, 10000 Zagreb, Hrvatska
Neda Striber
; Klinika za dječje bolesti, Klaićeva 16, 10000 Zagreb, Hrvatska
Danijel Cvetko
; KB Dubrava, Klinika za radiologiju, 10000 Zagreb, Hrvatska
Lucija Krtalić
; Klinika za dječje bolesti, Klaićeva 16, 10000 Zagreb, Hrvatska
Abstract
Aim: To report a rare case of a dermoid cyst and venous malformation appearing in the periocular region in a
16-month-old patient. Case report: A 16-month-old girl presented with a swelling in the medial angle of the
left eye, under the medial third of the left eyebrow arch. An ophthalmologic exam revealed an oval, partially
moveable soft tissue mass, 3 × 6 mm in size. Findings were consistent with a dermoid cyst so a follow-up was
recommended. Eighteen months later, a brain CT confirmed the presence of a subcutaneous oval lesion, 7 ×
19 × 15 mm in size, consistent with a dermoid cyst. During subsequent follow-up visits, a macroscopic increase
in lesion size was noticed and a follow-up brain CT was indicated. The brain CT showed no change in the
dimensions of the lesion, but revealed newly formed microcalcifications in the ventral part of the lesion, as
well as the fact that the lesion was reaching the proximal part of the nasolacrimal canal. An extirpation of the
lesion was performed and histopathological analysis confirmed the specimen was a completely removed
dermoid cyst. At the 6-week postoperative appointment, an induration was noticed in the place of the removed
dermoid cyst, and an ultrasound examination was scheduled. Results: Sonography revealed a new lesion, 16 ×
7 mm in size, suggesting the diagnosis of a hemangioma, and a follow-up ultrasound examination performed
one month later confirmed the lesion was a vascular structure. Magnetic resonance angiography of the brain
further characterized the lesion as a vascular structure consistent with a slow-flow venous malformation.
Treatment consisted of Bleomycin instillation into the vascular structure. Operative and postoperative courses
were uneventful. Conclusion: In the process of diagnosing soft tissue masses of the periocular region, dermoid
cysts and venous malformations, among others, come into consideration as differential diagnosis. Multiple
cases of clinical and radiological characteristics of one of these lesions mimicking the other have previously
been described. However, this Case Report does not involve a misdiagnosis, but rather a possible simultaneous
appearance of both of these lesions. In this case, it is presumed that the venous malformation presented only
after the removal of the dermoid cyst, owing to the pressure previously applied to it.
Keywords
dermoid cyst; vascular malformation; medial periocular region
Hrčak ID:
336294
URI
Publication date:
10.11.2025.
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