Abdominal pain in Systemic Lupus Erythematosus: About a rare cause.

Systemic lupus erythematosus (SLE) is an autoimmune disease with potential multisystemic involvement. Mesenteric panniculitis (MP) has been described as a rare feature in patients with SLE. The authors present a case of a 26 years old patient with previous diagnosis of SLE presenting with abdominal pain and distension and a peri-umbilical mass. Imagological findings were compatible with MP and ganglion biopsy revealed inflammatory pattern. Corticosteroid therapy was initiated with a resolution of pain after 6 months of treatment, with image reevaluation showing improvement of previous findings.

Masson's Tumour: A Rare Cause of Cervical Mass.

Masson's tumour, also known as intravascular papillary endothelial hyperplasia, is a rare non-neoplastic lesion of vascular origin, caused by an excessive reactive proliferation of endothelial cells in normal blood vessels or vascular malformations. It can affect any part of the body, presenting most frequently in the vessels of the head, neck and upper extremities. The authors describe the case of a 76-year-old female patient presenting an anterior cervical mass, measuring 2×2 cm, which was mobile, tender and slightly painful with no alteration of the overlying skin. Complementary study with ultrasound and computed tomography was inconclusive. Total excision of the lesion was performed with histology compatible with intravascular papillary endothelial hyperplasia. LEARNING POINTS: Masson's tumour is a rare and indolent non-neoplastic lesion of vascular origin, that can be easily confused with other pathological entities and misdiagnosed.Diagnosis can be a challenge; histological characterization is essential for differentiation from other lesions, such as angiosarcoma and Kaposi's sarcoma.Masson's tumour should be considered in patients presenting a single cervical mass.