Background: Calcifying fibrous tumor (CFT) is a rare entity, with a distinctive histological presentation, initially reported as childhood fibrous tumor with psammoma bodies. It is a benign hypocellular fibrous neoplasm calcifications and lymphoplasmacytic infiltrate. The CFTs may involve many sites, including gastrointestinal tract, pleura, abdominal cavity, and neck. The diagnosis might be challenging due to histological overlaps with other mesenchymal tumors. The prognosis is good. We describe herein the case of a 53-year-old woman with an incidentally diagnosed CFT of the mesentery. Case presentation: A 53-year-old woman presented to the surgery department with a 2-year history of an anterior abdominal hernia. A computed tomographic scan of the abdomen failed to demonstrate any evidence of a mesenteric nodule. The patient underwent surgical treatment. Careful exploration during the excision of herniated sac revealed a solitary nodule of the mesentery. Local excision was performed. On gross, it was a well-demarcated nodule. Microscopically, the tumor consisted of an abundant paucicellular hyalinized collagen with calcifications; associated to a sparse mononuclear inflammatory infiltrate. Conclusions: Calcifying fibrous tumor is a benign lesion. The diagnosis is based on histology, because clinical and radiological features are nonspecific. Awareness of this entity is crucial to distinguish it from other mesenchymal tumors especially in the gastrointestinal tract.

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Splenic hamartoma is very rare and benign tumor of the splenic. The few cases havebeen reported in the literature to date, this usually discovered incidentally during a radiological examination or an operation.We report a case of 49-year-old female with no past medical history, presented 8 month ago a pain and discomfort abdominal related to the growth mass in the left hypochondrium. Physical examination was remarkable a firmand painless mass below the left costal margin measuring almost 15 cm. Laboratory tests revealed a platelet count to 95000/mm. The computed tomography showed heterogeneous splenomegaly (19x14 cm) enhancement of the mass in the arterial phase and containing multiple areas of necrosis.A splenectomy was performed. Histologic study concluded to the diagnosis of splenic hamartoma.

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Diffuse lipomatosis of thyroid gland is very rare disease, characterized by diffuse proliferation of adipose tissue in the thyroid gland, the pathophysiology of adipose tissue infiltration in the thyroid gland remains unknown. We report a case of a 55-year-old female who presented 6 months ago a dysphonia, ultrasound of the neck revealed the presence diffuse goiter with heterogeneous echogenicity, her thyroid hormone levels were normal, thyroid isotope scanning showed heterogeneous uptake of radioactivity and coexistence of cold and hot nodules. The patient underwent total thyroidectomy. Histological study concluded to the diagnosis of diffuse lipomatosis of thyroid gland.