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Mineralizing Pulmonary Elastosis in a Cat.

Tzushan S Yang¹, Orion S Rivers², Wes A Baumgartner³

¹Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA; Department of Pathobiology and Population Medicine, Mississippi State University, Starkville, Mississippi, USA.

Journal of Comparative Pathology

|September 10, 2021

Summary

This summary is machine-generated.

Mineralizing pulmonary elastosis (MPE), a rare condition causing lung mineralization, was identified for the first time in a domestic cat. This finding highlights the importance of recognizing MPE in veterinary pathology to avoid misdiagnosis.

Keywords:

Gamna–Gandy body endogenous pneumoconiosis feline mineralizing pulmonary elastosis

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Area of Science:

Veterinary Pathology
Comparative Pathology

Background:

Mineralizing pulmonary elastosis (MPE) is a rare human lung condition often linked to recurrent pulmonary hemorrhage.
MPE presents complex histopathology with mineral deposits that can mimic fungal or inorganic material.

Observation:

This report details the first documented case of MPE in a domestic cat presenting with respiratory failure.
Necropsy revealed severe pulmonary haemosiderosis, granulomas, and mineralization of pulmonary vasculature and airway smooth muscle.
Fungus-like structures within the lungs stained positively for iron and calcium.

Findings:

The histochemical staining patterns of the mineralized material in the cat are consistent with MPE observed in humans.
The mineralization involved iron-calcium deposits within the lung tissue.

Implications:

This case expands the known species affected by MPE, suggesting it may occur in animals beyond domestic cats.
Accurate identification of MPE in veterinary pathology is crucial to prevent misinterpretation as fungal infections or other conditions.
Awareness of MPE's distinct features and necessary ancillary testing is important for veterinary pathologists.