Dystrophic mineralisation in chronic exogenous lipid pneumonia in cats

Author:

Mallol Claudia1ORCID,Espada Yvonne12,Lloret Albert3,Altuzarra Raúl1ORCID,Anselmi Carlo1,Novellas Rosa12

Affiliation:

1. Servei de diagnòstic per la imatge, Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain

2. Departament de Medicina i Cirurgia Animals, Facultat de Veterinària de la Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain

3. Servei de medicina interna, Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain

Abstract

Case series summary Exogenous lipid pneumonia with mineralisation of the lung parenchyma was diagnosed in three cats with radiographs, CT and/or bronchoalveolar lavage cytological findings. All three cats had a common clinical history of chronic constipation and long-term forced oral administration of mineral oil. All three cases showed radiographic findings compatible with aspiration pneumonia, with an alveolar pattern in the ventral part of the middle and/or cranial lung lobes. Minor improvement of the radiographic lung pattern in the follow-up studies was seen in two cats, and a miliary ‘sponge-like’ mineralised pattern appeared in the previously affected lung lobes months to years after the diagnosis. In one cat, patchy fat-attenuating areas in the consolidated lung lobes were present on thoracic CT. Cases 1 and 2 showed respiratory signs at the initial presentation, while in case 3 the radiographic findings were incidental and the cat had never exhibited respiratory signs. Relevance and novel information This is the first report to describe dystrophic mineralisation of the lung in exogenous lipid pneumonia and also the first to describe the CT features in cats. Exogenous lipid pneumonia should be included in the differential diagnosis in cases of miliary ‘sponge-like’ mineral opacities in the dependent part of the lung lobes on thoracic radiographs or CT in cats, especially in cases of chronic constipation, previously exposed to mineral oil.

Publisher

SAGE Publications

Subject

Small Animals

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