Case Report

Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog

Number: Advanced Online Publication Early Pub Date: June 1, 2026
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Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog

Abstract

Dermoid sinus (DS) is a rare congenital cutaneous malformation resulting from incomplete separation of the ectoderm from the neural tube during embryogenesis and is most commonly encountered in dogs along the dorsal midline. Atypical regional occurrences, including cranial localizations, are rare and may pose diagnostic and surgical challenges. This report describes a four-month-old male Pomeranian dog presenting with multiple progressive swellings within the parieto-occipital region of the head. Physical examination revealed firm, poorly demarcated masses without active drainage. Routine hematological and biochemical parameters were unremarkable. Surgical management consisted of complete excision of the lesions followed by reconstructive closure using a random-pattern advancement skin flap due to the extensive skin defect. Histopathological evaluation demonstrated a closed epithelial-lined lesion lacking communication with the epidermal surface, consistent with Type V DS, considering its localization within the parieto-occipital region of the head, the lesion was classified as subtype “b” (Type Vb DS). The postoperative course was uneventful, and no recurrence or wound healing issues were detected during the 12-month follow-up period. To the best of the authors’ knowledge, this represents the first documented report of Type Vb DS in a Pomeranian dog with detailed long-term postoperative follow-up. These findings emphasize the importance of thorough surgical excision and appropriate reconstructive planning when managing extensive DS lesions in atypical cranial regions.

Keywords

References

  1. Basinska M, McCready D (2025): A large type Va dermoid sinus (true dermoid cyst) on the dorsal thoracic region in an English Springer Spaniel dog. Vet Rec Case Rep, 13, e1020. DOI: 10.1002/vrc2.1020.
  2. Bornard N, Pin D, Carozzo C (2007): Bilateral parieto‐occipital dermoid sinuses in a Rottweiler. J Small Animal Pract, 48, 107-110. DOI: 10.1111/j.1748-5827.2006.00171.x.
  3. Buijtels D, Van Goethem B, De Cock H, et al (2015): Multiple dermoid sinus cysts on the head of a miniature schnauzer. Vlaams Diergeneeskd Tijdschr, 84, 6. DOI: 10.21825/vdt.v84i6.16439.
  4. Chun JL, Bang HT, Ji SY, et al (2019): A simple method to evaluate body condition score to maintain the optimal body weight in dogs. J Anim Sci Technol, 61, 366. DOI: 10.5187/jast.2019.61.6.366.
  5. Danciu CG, Briola C, Volckaert V, et al (2024): Diagnosis and surgical management of a type IVb dermoid sinus in a Cavalier King Charles Spaniel. Vet Rec Case Rep, 12, e786. DOI: 10.1002/vrc2.786.
  6. Dikbaş N, Yalin EE (2023): Characterization of the nasal dermoid sinus in a Rhodesian Ridgeback dog with computerized tomography and magnetic resonance imaging. Kafkas Univ Vet Fak Derg, 29, 2. DOI: 10.9775/kvfd.2022.28663.
  7. Hillbertz NS, Andersson G (2006): Autosomal dominant mutation causing the dorsal ridge predisposes for dermoid sinus in Rhodesian ridgeback dogs. J Small Anim Pract, 47, 184-188. DOI:10.1111/j.1748-5827.2006.00016.
  8. Kiviranta AM, Lappalainen AK, Hagner K, et al (2011): Dermoid sinus and spina bifida in three dogs and a cat. J Small Anim Pract, 52, 319-324. DOI: 10.1111/j.1748-5827.2011.01062.

Details

Primary Language

English

Subjects

Veterinary Surgery

Journal Section

Case Report

Authors

Behzat Tebrizi This is me
0000-0002-9075-7239
Türkiye

Early Pub Date

June 1, 2026

Publication Date

-

Submission Date

October 1, 2025

Acceptance Date

May 1, 2026

Published in Issue

Year 2026 Number: Advanced Online Publication

DOI

https://doi.org/10.33988/auvfd.1794953

IZ

https://izlik.org/JA77EB23MR

Cite

RIS / Bibtex
APA
Saylak, N., Önün, B., Ersöz Kanay, B., Çatalkaya, E., Tebrizi, B., Ekinci, E., & Yayla, S. (2026). Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog. Ankara Üniversitesi Veteriner Fakültesi Dergisi, Advanced Online Publication. https://doi.org/10.33988/auvfd.1794953
AMA
1.Saylak N, Önün B, Ersöz Kanay B, et al. Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog. Ankara Univ Vet Fak Derg. 2026;(Advanced Online Publication). doi:10.33988/auvfd.1794953
Chicago
Saylak, Nahit, Barış Önün, Berna Ersöz Kanay, et al. 2026. “Multiple Type Vb Dermoid Sinus in the Parieto-Occipital Region of a Pomeranian Dog”. Ankara Üniversitesi Veteriner Fakültesi Dergisi, no. Advanced Online Publication. https://doi.org/10.33988/auvfd.1794953.
EndNote
Saylak N, Önün B, Ersöz Kanay B, Çatalkaya E, Tebrizi B, Ekinci E, Yayla S (June 1, 2026) Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog. Ankara Üniversitesi Veteriner Fakültesi Dergisi Advanced Online Publication
IEEE
[1]N. Saylak et al., “Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog”, Ankara Univ Vet Fak Derg, no. Advanced Online Publication, June 2026, doi: 10.33988/auvfd.1794953.
ISNAD
Saylak, Nahit - Önün, Barış - Ersöz Kanay, Berna - Çatalkaya, Emine - Tebrizi, Behzat - Ekinci, Elif - Yayla, Sadık. “Multiple Type Vb Dermoid Sinus in the Parieto-Occipital Region of a Pomeranian Dog”. Ankara Üniversitesi Veteriner Fakültesi Dergisi. Advanced Online Publication (June 1, 2026). https://doi.org/10.33988/auvfd.1794953.
JAMA
1.Saylak N, Önün B, Ersöz Kanay B, Çatalkaya E, Tebrizi B, Ekinci E, Yayla S. Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog. Ankara Univ Vet Fak Derg. 2026. doi:10.33988/auvfd.1794953.
MLA
Saylak, Nahit, et al. “Multiple Type Vb Dermoid Sinus in the Parieto-Occipital Region of a Pomeranian Dog”. Ankara Üniversitesi Veteriner Fakültesi Dergisi, no. Advanced Online Publication, June 2026, doi:10.33988/auvfd.1794953.
Vancouver
1.Nahit Saylak, Barış Önün, Berna Ersöz Kanay, Emine Çatalkaya, Behzat Tebrizi, Elif Ekinci, Sadık Yayla. Multiple type Vb dermoid sinus in the parieto-occipital region of a Pomeranian dog. Ankara Univ Vet Fak Derg. 2026 Jun. 1;(Advanced Online Publication). doi:10.33988/auvfd.1794953