Haemangiopericytoma (HPC) is a rare soft-tissue tumour with great histological variability and unpredictable clinical and biological behaviour. HPC of the bladder is exceedingly rare and carries uncertain malignant potential. The current study reports a case of HPC of the bladder in a 48-year-old female, who was admitted to the Sir Run Run Shaw Hospital (Hangzhou, China) due to a large bladder ...

Haemangiopericytomas (HPCs) are rare vascular tumours arising from pericytes, which are contractile cells that spiral around capillary walls. Therefore HPCs have a wide distribution in both soft tissue and skeletal system, with the latter being the most unusual occurrence. Sixty-three cases of osseous HPC have been reported in the available literature, only four of them located in the tibia (7,

This review focuses on the tumour types and symptoms associated with non-islet cell tumour-induced hypoglycaemia (NICTH) as well as the pathogenesis, diagnosis and treatment of this rare paraneoplastic phenomenon. In addition, we report two illustrative cases of patients suffering from NICTH caused by a solid fibrous tumour and a haemangiopericytoma respectively. In the first case, NICTH resolv...

Hemangiopericytoma (HPC) is an exceedingly rare tumor of uncertain malignant potential. Approximately 300 cases of HPC have been reported since Stout and Murray described HPCs as "vascular tumors arising from Zimmerman's pericytes" in 1942. After further characterization, the WHO reclassified HPC as a fibroblastic/myofibroblastic tumor. Long term follow up is mandatory because the histologic cr...

BACKGROUND Hikui disease is a well known disfiguring disease of koi carp (Cyprinus carpio) primarily affecting fish with red pigmentation. It causes light orange to golden yellow, multifocal to coalescing raised patches, starting from the red cutaneous areas. Some cases respond to surgery or topical treatment, but recurrence is common. OBJECTIVES To describe the clinical and pathological pres...

In the 4th edition of the WHO Classification of Tumours of the Breast, myoepithelial lesions are retitled myoepithelial and epithelial-myoepithelial lesions in order to better reflect the dual participation of luminal and myoepithelial compartments in some key entities. Malignant myoepithelioma, described as a section within the chapter on myoepithelial lesions in the 3rd edition, is recognised...

Angiosarcoma of the larynx is a rare malignant tumour of vascular origin, accounting for less than 1% of all malignant tumours of the larynx. Angiosarcoma involves, in particular, the head and neck in areas such as the scalp and face. The causes are unknown, even if, in some cases, it is believed to be radiation-induced. The case is described of a patient with hypopharyngolaryngeal angiosarcoma...

A 35-year-old Japanese woman was referred to our hospital with a small, asymptomatic tumour on her scalp. The lesion had been present for approximately 3 years and was not associated with any pain or tenderness. Physical examination revealed a 1-cm diameter, firm, and slightly reddish subcutaneous tumour on her scalp (Fig. 1). Clinically, the lesion was initially thought to be a pilomatricoma, ...

INCIDENCE Seybold, McDonald, Clagett, and Harrington (1949) made the f i s t collective review of these tumours, in which they mainly discussed their pathology. They could find only 14 cases, to which they added 3 more cases from the Mayo Clinic. The real incidence of these neoplasms in relation to other mediastinal masses is very difficult to estimate. However, the widening scope of thoracic s...