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Rickets in a 6-month-old monkey
1Department of Pathology, Animal Medical Center, New York 10021 USA
Abstract:
A 6-month-old male monkey with rickets was found dead by its keeper. Radiographic studies showed osteopenia of the entire skeletal system, a cup-shaped concavity and poor mineralization of metaphyseal ends, and markedly widened and irregular epiphyseal growth plates of the long bones and ribs. Gross anatomic findings included bowing abnormalities and microfractures in the radius, ulna, tibia, and fibia, and enlarged and widened cartilage columns extending into the metaphyses in the long bones and ribs. Histologic features included deficient mineralization and irregular disordered columns of proliferating cartilage in growth plates extending into other zones, dilated vascular channels, and poor mineralization of chondroid and osteoid tissues.
Insights
A juvenile monkey case study revealed severe rickets, characterized by widespread osteopenia and growth plate abnormalities. This highlights the critical impact of nutritional deficiencies on skeletal development in primates.
Area of Science:
- Veterinary Pathology
- Primate Medicine
- Skeletal Biology
Background:
- Rickets is a condition affecting bone mineralization, primarily in young individuals.
- Nutritional deficiencies, particularly Vitamin D, calcium, or phosphorus, are common causes of rickets.
- Primate models are crucial for understanding bone diseases and their systemic effects.
Observation:
- A 6-month-old male monkey presented with clinical signs of rickets post-mortem.
- Radiographic imaging revealed generalized osteopenia, metaphyseal abnormalities, and widened, irregular epiphyseal growth plates.
- Gross examination showed skeletal deformities, microfractures, and enlarged cartilage columns.
Findings:
- Histological analysis confirmed deficient mineralization of bone and cartilage.
- Disordered proliferation of cartilage at the growth plates extended into other zones.
- Dilated vascular channels and poor osteoid mineralization were prominent features.
Implications:
- This case underscores the severe skeletal consequences of rickets in non-human primates.
- It emphasizes the importance of adequate nutrition for proper skeletal development in captive primates.
- The findings contribute to the understanding of rickets pathophysiology and its radiographic and histologic manifestations.