Summary The use of markers placed over the tuber coxae on each side of a horse to aid identification of the relative movement of these structures at the trot, for teaching and research purposes, is described. In each case of hindleg lameness studied, the tuber coxae on the lame side showed a consistent increase in vertical displacement relative to that of the contralateral limb, and a characteristic pattern of movement throughout the stride irrespective of the site or cause of pain.

Summary Seventeen cases of guttural pouch mycosis (including two bilaterally affected cases) were diagnosed in a three year period. The presenting signs were, in order of frequency, epistaxis at rest, nasal catarrh, pharyngeal paralysis, ipsilateral laryngeal hemiplegia, swelling of the submandibular/parotid region, extension of the head and neck and dyspnoea. Ligation of the origin of the internal carotid and occipital arteries was attempted in 10 of the cases exhibiting epistaxis. Bilateral ligation was performed on one animal with an untoward sequelae. Where surgery was successfully completed further haemorrhage was prevented in eight out of nine affected pouches (89 per cent). Medical treatment involving local administration of various antifungal preparations via a specially designed catheter and/or the oral administration of benzimidazole drugs was successful in eliminating the mycotic plaque in most cases. Cases which presented with pharyngeal paralysis were all fatal.

Summary The value of radiology as part of an examination of the equine head is emphasised and the radiological appearances of more commonly occurring conditions are described. Even the normal anatomy of this complex site is subject to great variation and the aspiring radiologist should, therefore, have a good knowledge of the possible normal variations. A flexible approach must be used rather than a limitation to one or two ritual projections. The use of contrast media, wherever it might be useful, is advocated so that the maximum amount of information may be obtained from each examination. Finally, emphasis is laid on the fallibility of radiology when used in isolation and its use to complement other investigative procedures, such as endoscopy, is encouraged.

Summary The treatment of equine cutaneous tumours by conventional or cryosurgical techniques can be limited where the position of the tumour makes radical excision or freezing impractical or dangerous. Radiotherapy provides an effective and practical alternative. The use of iridium pins with guide needles allows accurate positioning of sources and uniform radiation fields to be achieved. The subsequent removal of the pins reduces the period of incapacity and reduces the radiation risk when compared to permanently implanted sources. Twenty‐seven tumours on 26 horses were treated by this method with a 100 per cent success rate after a single irradiation. The technique of implantation is described and the criteria used to select cases and to assess the efficacy of this treatment are discussed. Résumé Parfois l'emplacement d'une tumeur est telle que les techniques conventionnelles de traitement ou la cryochirurgie sont impraticables ou dangereuses. La radiothérapie procure une alternative commode et efficace. Les aiguilles d'iridium glissées dans des aiguilles guides sont faciles à mettre en place et fournissent une irradiation uniforme. Leur retrait réduit la durée d'incapacité et diminue le risque d'irradiations. Vingt‐sept tumeurs ont été ainsi traitées sur 26 chevaux avec 100 pour cent de réussite après une seule irradiation. La technique d'implantation est décrite, ainsi que les critères de sélection des cas cliniques et d'appréciation de l'efficacité du traitement. Zusammenfassung Die Behandlungsmöglichkeiten von Hauttumoren des Pferdes durch Konventionell‐chirurgische oder cryo‐chirurgische Techniken können dann eingeschränkt sein, wenn eine radikale Excision oder das Gefrieren nicht durchführbar oder wegen der Lage des Tumors gefährlich wäre. Die Radiotherapie stellt eine wirksame und praktische Alternative dar. Iridium‐Stifte mit Führnadeln erlauben ein exaktes Plazieren der Strahlungsquelle und gewährleisten uniforme Strahlungsfelder. Das Entfernen der Stifte reduziert die Periode der Ruhigstellung und selbstverständlich auch die Strahlungsrisiken, verglichen mit permanenten Implantaten. Sieben und zwanzig Tumoren von 26 Pferden wurden derart behandelt, wobei der Erfolg bei 100 Prozent nach einmaliger Bestrahlung lag. Die Technik der Implantation wird beschrieben; die Kriterien für die Auswahl der Fälle und für die Beurteilung des Behandlungserfolges werden diskutiert.

Summary Over a period of seven years, 30 horses were treated by surgical arthrodesis for lameness resulting from osteoarthrosis of the proximal intertarsal, distal intertarsal and tarsometatarsal joints (bone and occult spavin). Twenty‐five horses were affected in one hock only and five were affected bilaterally. Four different techniques for achieving arthrodesis were used. Fourteen out of 18 horses (78 per cent) with involvement of the distal intertarsal and tarsometatarsal joints only and six out of 11 horses (55 per cent) in which the proximal intertarsal joint was also involved became sound following surgery. The status of one other horse, with involvement of the proximal intertarsal joint, is not known.