Surgical Specialist Services at Friendship Hospital for Animals

Friendship Surgical Specialists (FSS) is located in Friendship Hospital for Animals and is the only veterinary surgical specialist group in Washington, DC. Led by board-certified surgeons’ Dr. Mathieu Glassman and Dr. Dirsko von Pfeil, FSS provides the finest orthopedic and soft tissue surgery ensuring the highest likelihood of favorable outcomes. FSS works with’ The Oncology Service at Friendship Hospital for Animals to provide boarded surgical care for cancer patients. We will also work with you to provide outstanding pre- and post-surgery care.

FSS operates Mondays through Saturday and offers a wide variety of advanced surgeries—orthopedic, soft tissue, and emergency dog and cat surgery.

Advanced Services & Surgeries


  • Orthopedic traumatology fracture management
    • Internalplate fixation
    • Externalfixation
  • Joint surgery
  • Cruciate disease—advanced locking TPLO plating technology
  • Luxating patella surgery
  • Limb deformity correction
  • Maxillofacial trauma
  • Lameness evaluation

Soft Tissue

  • Oncological surgery (in coordination with The Oncology Service)
    • Radicaltumor resection
    • Maxillectomyand mandibulectomy
    • Reconstructivesurgery
    • Thoracictumor resection
    • Limbamputation
    • Thyroidtumor removal
  • Wound management and reconstruction
    • Skingrafting
    • Skipflap
  • Hepatic surgery
    • Porto-systemicliver shunt
    • Gallbladderand biliary surgery
  • Hernia repair
  • Gastrointestinal disease
  • Megacolon
  • Thoracic surgeries
    • Patientductus arteriosis (PDA)
    • Persistentright aortic arch (PRAA)
    • Lunglobe torsions
  • Laryngeal paralysis
  • Ear canal ablation
  • Salivary mucocele
  • Urogenital surgery
    • Urinaryobstruction
    • Surgicalmanagement of urinary incontinence
    • Vulvoplasty
  • Prophylactic surgery
    • Gastropexy
    • Brachycephalicairway disease correction
  • Anal sac tumor resection

Emergency Surgery

  • Fracture repair
  • Gastric dilatation and volvulus (GDV)
  • Gastrointestinal obstruction
  • Hemoabdomen surgery
  • Pyometra surgery
  • Splenectomies
  • And more…

Meet our Surgical Specalists

Mathieu Glassman, VMD, DACVS, Chief of Surgery

A native of Washington, DC, Dr. Glassman joined the Friendship Hospital for Animals team in 2011. After graduating from the University of Pennsylvania School of Veterinary Medicine (2004), Dr. Glassman completed a small animal internship at The Ohio State University (2005), a surgical internship in Hollywood, Florida (2006), and a residency in small animal surgery at the University of Georgia (2010). He became a diplomat of the American College of Veterinary Surgeons in 2011 and worked as a clinical orthopedic instructor at the University of Georgia before joining Friendship.

Dr. Glassman specializes in orthopedic and soft tissue specialty surgery, with special interests in joint surgery, fracture management with internal plate fixation and external skeletal fixation, emergency surgeries, and advanced wound management and reconstructive surgery.

Contact Dr. Glassman

Dirsko von Pfeil,, DVM, DACVS, DECVS

After studying veterinary medicine in Germany, France and Sweden Dr. von Pfeil graduated from Berlin in 2001 before being selected for an internship at Kansas State University (KSU). This was followed by the American DVM, a surgery residency and fellowship at Michigan State University (MSU) (resident of the year, elected by the MSU class 2006), leading to double-board certification with the American and European Colleges of Veterinary Surgeons in 2008. He then worked as professor in surgery at KSU and at veterinary referral centers in Alaska and Virginia before joining Friendship Surgical Specialists in 2015.

Dr. von Pfeil is a highly regarded leader in the advancement of minimally invasive surgery and challenging surgical procedures. In addition to his expertise in soft tissue reconstruction, fraction repair and fluroscopically-guided procedures, Dr. von Pfeil has successfully completed thorascopic lung lobectomies and pericardectomies, and cardiac pacemaker implantations.

Contact Dr. von Pfeil

For FSS services please don’t hesitate to call, email us or refer your patient using our online referral form.