The spleen has been considered a 'forgotten organ' even if it is included and well demonstrated on every CT and MRI of the abdomen. Tumours of the spleen are rare; however, radiologists need to be aware of the main tumoral features and patterns in order to try to distinguish between benign and malignant masses often discovered incidentally. The principal tumoral masses, benign (cysts, haemangio...

There are numerous reports of the frequency with which Kaposi's sarcoma is encountered in the African. It is a true but atypical sarcoma, starting as a single reddish or purplish nodule on one or both lower extremities. Further nodules form slowly and spread up the limb, while at the same time the earlier lesions tend to coalesce. The condition is generally bilateral, resulting in a stocking di...

An eight-year-old, male neutered, crossbred dog was presented for investigation of a lingual mass of four months duration. Oral examination revealed a 7 cm × 5 cm soft, fluctuant mass at the caudal aspect of the tongue. Ultrasound examination of the mass demonstrated mixed echogenicity, with cavitations containing hypoechoic and anechoic regions. Lingual haemangiosarcoma was diagnosed on histop...

In 1872 Kaposi described a dermatological condition which he called 'idiopathic multiple pignent sarcoma '. At the present time it is often known as Kaposi's haemangiosarcoma. Kaposi described it as affecting the skin, and it certainly affects this part most often, but for years it has been known to involve other organs. In 1940, Choisser and Ramsey reviewed the literature and mentioned a total...

Haemangiosarcoma is a rare vascular tumour in horses, usually originating from blood vessel endothelial cells. We present the case of an 8-day-old foal, referred for atypical large subcutaneous mass on left side since birth. Ultrasonographically, it showed multiple cavities with hypoechoic content, marked vascularisation and fluid movement between cavities. As nature suggested that surgery coul...

An ulcerated, 1 x 0.5 cm, subcutaneous mass on the craniolateral aspect of the right tibiotarsus of a 4-year-old male cockatiel was removed. Histologically, the neoplasm was non-encapsulated, infiltrative and composed of irregular vascular channels lined by branching and variably sized spindle-shaped cells with large vesicular nuclei, prominent nucleoli and rare mitoses. Surrounding these vascu...