Romiplostim as Adjunctive Treatment of Refractory Amegakaryocytic Immune Thrombocytopenia in a Dog.
Top Companion Anim Med
; 42: 100488, 2021 Mar.
Article
in En
| MEDLINE
| ID: mdl-33115689
A 9-year-old, intact male, mixed-breed dog was admitted with a 3-day history of severe thrombocytopenia and bleeding diathesis. Physical examination revealed mucosal and cutaneous petechiae and ecchymoses, melena, and gross hematuria. Clinicopathologic evaluation indicated severe thrombocytopenia, anemia, and panhypoproteinemia. Serology for common endemic vector-borne pathogens was negative and thoracic and abdominal imaging was unremarkable. Bone marrow aspiration cytology revealed aplasia of the megakaryocytic lineage, in the context of a mildly hypoplastic myeloid and a normal erythroid series. A diagnosis of presumptive primary amegakaryocytic immune thrombocytopenia (ITP) was established. Treatment with vincristine, prednisolone, and mycophenolate mofetil along with several whole blood transfusions failed to achieve clinical and clinicopathologic remission. As an adjunct treatment, romiplostim was administered at a cumulative dose of 15 µg/kg, subcutaneously, in 2 sessions, 1 week apart, and complete clinical and hematological remission was noted 8 days postinitiation of romiplostim. Thirty-eight months later, the dog remains clinically healthy with no evidence of hematological relapse. Romiplostim could be a promising adjunctive treatment option in dogs with refractory ITP.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Thrombopoietin
/
Recombinant Fusion Proteins
/
Receptors, Fc
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Purpura, Thrombocytopenic, Idiopathic
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Dog Diseases
Limits:
Animals
Language:
En
Journal:
Top Companion Anim Med
Journal subject:
MEDICINA VETERINARIA
Year:
2021
Document type:
Article
Affiliation country:
Greece
Country of publication:
United States