Intracortical hemangioma of bone. Report of two cases and review of the literature.
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Adult↗
Biomedical subjects
S Sánchez-Herrera
Publications and source records attributed to S Sánchez-Herrera.
Primary aneurysmal cyst of soft tissue. Report of a case with ultrastructural and MRI studies.
We report a case of primary aneurysmal cyst of soft tissues in a 57-year-old woman presenting with a painful mass in her left arm. Conventional radiography showed a radiolucent soft tissue mass surrounded by a ring of bone. MRI displayed an unusual, ill-defined soft tissue lesion that was not connected to the nearby humerus and appeared to be an aggressive tumour. Microscopically, the mass consisted of multiple anastomosing cavernous channels surrounded by a peripheral band of mature trabecular bone. These bloody channels were separated by fibrous septa containing fibroblasts, histiocytes and multinucleated giant cells, as well as fibromyxochondroid material. Some of these giant cells lined the septa and partially occupied the lumen of the channels. Ultrastructurally, the features observed in this tumour were similar to those described in aneurysmal bone cyst; the giant cells lining the septa were an additional observation. Whereas most bone tumours have a well-known extraosseous counterpart, this unique lesion is not well recognized by surgical pathologists and the few published cases have been reported under different names. Gross, microscopic, radiological and ultrastructural findings are presented to familiarize pathologists with this underdiagnosed condition.
Bone Cysts, Aneurysmal↗
Primary aneurysmal cyst of soft tissues (extraosseous aneurysmal cyst)
In this report we describe a soft-tissue aneurysmal cyst located in the left shoulder of a 20-year-old woman. Although the tumor initially was clinically considered a myositis ossificans, the microscopic features were identical to those found in classic aneurysmal bone cyst (ABC). Light microscopy showed a lesion composed of a peripheral band of mature trabecular bone surrounding a multicystic central area made up of anastomosing cavernous blood channels separated by fibrous septa that contained osteoid, mineralized myxochondroid material and osteoclastic giant cells. Whereas most bone tumors have an extraosseous counterpart, ABC has been found outside the bone only once, in an artery, but never in soft tissues. Moreover, major reviews state that aneurysmal bone cyst occurs exclusively within bones. This unique case is a very rare occurrence of one of these lesions in the soft tissues.
Adult↗
Case report 639: Malignant fibrous histiocytoma (MFH) of the patella.
Malignant fibrous histiocytoma of bone is a rare skeletal neoplasm, reported in the patella on only a few occasions. We describe an additional case in this bone in an 84-year-old woman. We believe this neoplasm should be considered in the differential diagnosis of malignant tumors of the patella.
Aged↗
Intracortical osteosarcoma. A case report.
Intracortical osteosarcoma (IO) is the rarest form of osteosarcoma. A 19-year-old man had one of these lesions in the upper diaphysis of the femur. Microscopically, IO was a well-differentiated osteosarcoma with an osteoblastic histologic pattern. The typical location in the diaphysis and the peculiar histologic and roentgenographic findings with intracortical origin clearly separate this entity from conventional osteosarcomas as well as periosteal and parosteal osteosarcomas. IO are lytic neoplasms confined to the cortex of the diaphysis with a benign roentgenographic appearance, but are included in the differential diagnosis of benign tumors.
Adult↗