Dermoid sinus type VI associated with spina bifida and tethered cord syndrome in a French Bulldog

Abstract

A 4-mo-old French bulldog was presented with acute onset pain and reluctance to move. A tubular structure arising in the dorsal thoracic midline and extending from a cutaneous orifice into deeper tissues was palpated on physical examination. Computed tomography with sinography revealed a dermoid sinus associated with spina bifida at the level of T3-T4. On surgical exploration, the dermoid sinus was found to communicate with the dura. Histology confirmed the diagnosis and classification as a type VI dermoid sinus. The pain response and hyperesthesia were suspected to be the result of tethered cord syndrome. Complete resolution of clinical signs was appreciated post-surgery, with the patient still free of clinical signs 3 mo later.

Case Report: Surgical Treatment of Type IV Spinal Dermoid Sinus in a Shiba Inu

“…However, a recent study concluded that the 133-kb duplication involving three FGF genes was not identical with the hypothesized locus for dermoid sinus ( 5 ). Dermoid sinus has been reported in several other breeds such as Yorkshire terrier, American cocker spaniel, English springer spaniel, Chow chow, Golden retriever, Siberian husky, French bulldog, Dachshund, Chinese crested dog, Swedish vallhund, Victorian bulldog, and Cane corso ( 8 – 11 , 13 – 17 , 20 , 24 – 26 ). The mode of inheritance in these dogs other than Rhodesian ridgeback has not been clarified, and dermoid sinus is considered to be sporadic.…”

Type IV dermoid sinus, intramedullary dermoid cyst and spina bifida in a Cane Corso

“…This condition is commonly reported in Rhodesian Ridgebacks, but has been described in other breeds as well (Mann & Stratton 1966, Cornegliani et al 2001, Miller & Tobias 2003, Kiviranta et al 2011, Motta et al 2012, Barrios et al 2014, Kopke et al 2019. A classification differentiating six types and three subtypes of dermoid sinus has been made, according to its relationship with the supraspinous ligament, the presence of a skin orifice and its anatomical location (Kiviranta et al 2011, Kopke et al 2019. Presumptive diagnosis is based on clinical findings, and results of advanced diagnostic imaging.…”

Comparison of inherited neural tube defects in companion animals and livestock

“…Cases of dermoid sinus can vary in severity (Collins, Asher, Summers, Diesel, & McGreevy, 2010). They have been noted in several dog breeds (OMIA 000272‐9615), including the boxer, Dachshund, English springer spaniel, French bulldog (Figure 1d,e; images are of a different unpublished French bulldog case), golden retriever, Siberian husky, shih tzu, and Yorkshire terrier (Barrios et al, 2014; Cornegliani & Ghibaudo, 1999; Kopke et al, 2019; Motta et al, 2012; Ployart, Doran, Bomassi, Bille, & Libermann, 2013; Pratt et al, 2000; Sturgeon, 2008). Dermoid sinus is most commonly found as an inherited condition in the Rhodesian ridgeback and Thai ridgeback dog breeds (Appelgrein et al, 2016; Mann & Stratton, 1966; Salmon Hillbertz, 2005).…”