Intravascular Papillary Endothelial Hyperplasia: Case Report of a Recurrent Masson's Tumor of the Finger and Review of Literature.

Intravascular papillary endothelial hyperplasia (IPEH), often referred to as Masson's Tumor, is an uncommon yet benign vascular disease of the skin and subcutaneous tissues. It usually arises within a blood vessel, but is considered to be a non-neoplastic reactive endothelial proliferation commonly associated with vascular injury. Although it is rare, knowledge of this disease is important as it may mimic other benign and malignant tumors, especially angiosarcoma, which may lead to unnecessary aggressive management. Typically, IPEHs are asymptomatic and are slow growing soft-tissue masses with extremely low-recurrence rates. In this article, we describe a 19-year-old male with a recurrence of Masson's Tumor over the right little finger within 2 months of a routine excision of the lesion. We also present accompanying multimodality clinical, radiological, and pathological imaging. This case illustrates the innocuous nature of the initial lesion easily mistaken for a hemangioma. Awareness of the possibility of a recurrence of a Masson's Tumor is important for clinicians to rule out the presence of malignant vascular lesions.

Clival chordoma with drop metastases.

Chordoma is a rare midline malignant tumor arising from embryonic remnants of the primitive notochord. The base of the skull is the second most common site of disease after the sacrococcygeal region. Intracranial chordoma constitutes about 30-35% of chordoma cases. Metastasis from chordoma is uncommon but if occurs, it tends to spread to the lungs. Cerebrospinal fluid seeding or drop metastasis is very rare. Here we describe a case of a clival chordoma with drop metastases.

Incidence and anatomical distribution of hand tumours: a Singapore study.

INTRODUCTION: Hand tumours are frequently encountered in clinical practice. A list of differential diagnoses of the most common hand tumours based on anatomical location would be helpful for clinicians. We aimed to determine the anatomical distribution of hand tumours seen at a hand surgery practice in Singapore. METHODS: The medical records of 50 men and 65 women (mean age 41.7 [range 17-74] years) who underwent excision of hand tumours between 1 June 2010 and 31 December 2012 were reviewed. The histological diagnoses and anatomical locations of the tumours were analysed. The locations were divided into three main groups: (a) distal to the metacarpophalangeal joints (MCPJs); (b) between the MCPJs and carpometacarpal joints (CMCJs); and (c) between the CMCJs and the radiocarpal joint (RCJ). RESULTS: Overall, the most common tumours excised from the hand were ganglions (n = 66/116, 56.9%) and giant cell tumours of the tendon sheath (GCTTSs; n = 11/116, 9.5%). However, distal to the MCPJs, GCTTSs (n = 11/39, 28.2%) were more common than ganglions (n = 7/39, 17.9%). Most of the ganglions (n = 59/66, 89.4%) arose from between the CMCJs and RCJ. CONCLUSION: Most hand tumours were benign. Ganglions were the most common tumours between the CMCJs and RCJ, while GCTTSs were the most common tumours distal to the MCPJs.

Clinics in diagnostic imaging. 158. Duodenal ectopic pancreas.

A 46-year-old man presented with right loin tenderness following a road traffic accident. Computed tomography and magnetic resonance imaging showed a well-defined, smooth, enhancing oval lesion in the wall of the first part of the duodenum. The lesion was seen separately from the normal pancreas. It showed attenuation, intensity and enhancement similar to that of normal pancreas. Based on the imaging appearance, a diagnosis of ectopic pancreas was made. The patient underwent oesophagogastroduodenoscopy, endoscopic ultrasonography and fine-needle aspiration cytology of the lesion, which confirmed ectopic pancreatic tissue. Since the patient was asymptomatic, surgical resection was deferred. The embryologic origin, various locations, imaging appearance and clinical significance of ectopic pancreas are discussed.

Sebaceous lymphadenoma: a case report and review of the literature.

An 80-year-old woman presented with a mass in her left parotid region. An ultrasound-guided core biopsy showed sebaceous glands with lymphoplasmacytic infiltration. Magnetic resonance imaging displayed a well-circumscribed lesion within the left parotid gland. The mass was completely excised, and the patient made a full recovery. Sebaceous lymphadenomas of the salivary glands are rare, benign tumors that are effectively treated by complete excision. The challenge that these tumors present lies in their accurate diagnosis. Because of their histologic similarity to related malignant tumors, such as mucoepidermoid carcinomas and sebaceous lymphadenocarcinomas, misdiagnosis could lead to unnecessarily radical treatment. We highlight the need for careful clinical and histologic diagnosis in tumors of the salivary glands.