Alopecia in a black Labrador retriever associated with focal sub-follicular panniculitis and sebaceous adenitis.

A 6-year-old entire male black Labrador retriever was presented with nonpruritic multicentric, well-demarcated alopecia of 12-weeks duration. Skin biopsies from the margins of alopecic regions showed sebaceous adenitis and sub-follicular panniculitis. Biopsies from alopecic areas showed severe follicular atrophy with residual fibrous tracts, loss of sebaceous glands and lymphohistiocytic panniculitis beneath individual atrophic hair follicle groups. These features differed from previous reports of pilosebaceous diseases of dogs and appeared to extend the spectrum of inflammatory patterns in presumed immune-mediated adnexal diseases of this species. During the 12-month follow-up, there was partial hair regrowth without treatment but alopecia was permanent in the centre of larger lesions.

Sinonasal plasmacytoma in a cat.

A 13-year-old female spayed Domestic Shorthair cat presented with a history of right-sided mucopurulent nasal discharge for 18 months. Computed tomography revealed a mass within the right nasal cavity and the right frontal sinus. The animal was euthanized, and a postmortem examination was performed. On macroscopic examination, the right nasal cavity and the right frontal sinus were partially occluded by a soft whitish mass. Microscopically, the mass was composed of well-differentiated plasma cells that were immunopositive for immunoglobulin G and lambda light chains. These findings were consistent with a mature-type sinonasal plasmacytoma. In addition, there was right-sided mucopurulent rhinitis and sinusitis caused by a Pasteurella infection, which probably developed secondary to the sinonasal plasmacytoma. To the authors' knowledge, this is the first report of a sinonasal plasmacytoma in a cat. The present communication shows that feline sinonasal plasmacytomas should be included in the differential diagnosis for tumors located in the upper respiratory tract of cats.

Lupoid Dermatosis in Five German Short-haired Pointers.

Résumé- La dermatose lupoïde du Braque Allemand doit être considéré comme une génodermatose bien que le nombre de cas décrit soit faible. Cette maladie concerne de jeunes chiens. Aucune prédisposition sexuelle n'est notée. Pour l'instant, cette maladie n'a été observée que chez le Pointer. Le diagnostic repose sur l'examen clinique et l'examen histopathologique des biopsies cutanées. Le pronostic est généralement réservé, mais l'utilisation des acides gras et un traitement symptomatique peuvent être préconisés. [Vroom, M.W., Theaker, M.J., Rest, J.R., White, S.D. Lupoid dermatosis in five German short-haired pointers (Dermatose lupoïde chez cinq Braques Allemands). Resumen- La dermatosis lupoide del Pointer Alemán de pelo corto podria ser un genodermatosis, aunque el número de casos descritos es bajo. Esta enfermedad se presenta en perros jóvenes. No hay predisposición por sexo. Hasta el momento sólo se ha descrito como tal en el Pointer Alemán de pelo corto. El diagnóstico se realiza mediante examen clinico e histopatológico de biopsias cutáneas. El pronóstico es grave, pero se recomienda un tratamiento sintomático y con ácidos grasos. [Vroom, M.W., Theaker, M.J., Rest, J.R., White, S.D. Lupoid dermatosis in five German short-haired pointers (Dermatosis lupoide en cinco perros Pointer alemán de pelo corto). Abstract- Lupoid dermatosis of the German short-haired pointer may be a genodermatosis, although the number of cases reported is low. The disease occurs in young dogs. There is no sex predisposition. Until now the disease has only been consistently described in the German short-haired pointer. Diagnosis can be made by clinical examination together with histopathological examination of skin biopsies. The prognosis is usually poor, but fatty acid and symptomatic treatment should be attempted.

Fatal inflammatory heart disease in a bonobo (Pan paniscus).

We report the first probable identification of encephalomyocarditis virus (EMCV) in a bonobo (Pan paniscus) that had been part of a forest re-introduction programme. Clinical presentation was of episodic acute on chronic heart failure and cerebral infarction with end-stage renal failure rather than sudden death which is more commonly associated with EMCV infection. A postmortem diagnosis of probable EMCV was made using gross pathological and histopathological examination. Findings included acute on chronic heart failure combined with the unusual but characteristic histopathological features of non-suppurative necrotizing myocarditis with mononuclear, inflammatory infiltration of the brain.

A prospective study of the clinical findings, treatment and histopathology of 44 cases of pyotraumatic dermatitis.

Pyotraumatic dermatitis (hot spot) is a common clinical syndrome in dogs but there are few prospective scientific studies related to it. The aim of this study was to investigate correlations among clinical pyotraumatic dermatitis, histopathology of the lesions and possible predisposing causes. The relationship of these with breed, age, sex and location of lesion was assessed statistically. A clinical diagnosis of acute pyotraumatic dermatitis was made in 44 privately owned dogs. Males exceeded females (P = 0.0348) and lesions were more common in dogs aged 4 years or less (P < 0.0001). Lesions were most often seen on the cheek, neck and lateral thigh with a significant correlation between breed and site of lesion (P < 0.0001). In 31 cases a possible underlying cause was found or suspected. In contrast to previous studies, no otitis externa was recorded and the study was conducted in an area without endemic fleas. Fourteen breeds were represented of which Rottweiler, German shepherd dog and golden retriever were most common. There was no significant seasonal incidence and no correlation among site of lesion and cause, time of year, age or sex. Histopathologically, the dogs could be separated into four patterns by the presence or absence of eosinophils and/or folliculitis. Eosinophils have not previously been recorded in pyotraumatic dermatitis but were seen in 29 cases. Acute folliculitis was seen in 20 cases. However, no correlation was seen among age, sex, breed, underlying cause or site of lesion and histopathology. Twenty-seven cases were cultured for bacteria of which 25 grew Staphylococcus intermedius and two were negative.