11] Since these tumours consist of admixtures of both classical squamoid and spindle shaped sarcomatoid cells, different terms such as carcinosarcoma, metaplastic carcinoma, pseudosarcoma
, sarcomatoid carcinoma, spindle cell carcinoma are used to describe them.
Heterotopic mesenteric ossification: a distinctive pseudosarcoma
commonly associated with intestinal obstruction.
Malignant tumours simulating AAM include mixed mesodermal tumours, malignant fibrous histiocytomas, botyroid pseudosarcoma
, embryonal rhabdomyosarcomas squamous cell carcinomas and extramucosal anal adenocarcinomas.
Liposarcomas have to be differentiated from benign entities such as a true lipoma or, in our patient with a BMI of 61, pseudosarcoma
of the morbidly obese.
Since then, it has also been called pseudosarcoma
, spindle cell carcinoma, and sarcomatoid carcinoma.
(polypoid sarcoma-like masses) associated with squamous-cell carcinoma of the mouth, fauces, and larynx: Report of ten cases.
72,82,139-150) We prefer the term inflammatory myofibroblastic tumor, which encompasses a variety of terms in the literature, including inflammatory pseudotumor, pseudosarcomatous myofibroblastic tumor, inflammatory pseudosarcomatous fibromyxoid tumor, and fibromyxoid pseudotumor; this term is reflective of the low-grade nature of this lesion and does not incite the same alarm and confusion as the terms that include pseudosarcoma
Cutaneous carcinosarcomais a biphasic malignant tumor made up of both epithelial and mesenchymal components, (2,5,6,11,13,14) Our review of the literature revealed a lack of consensus regarding terminology, as this entity is variously referred to as spindle-cell carcinoma, sarcomatoid carcinoma, metaplastic carcinoma, and pseudosarcoma
of the larynx: a comprehensive analysis.
1) This tumor has also been referred to as carcinosarcoma, pseudosarcoma
, spindle cell carcinoma, and polypoid carcinoma.
Small Round Cell Tumors of Bone Pseudosarcomas
of Soft Tissue
Useful Histopathologic or Etiologic Features of Intestinal Pseudoneoplasms Pseudoneoplasm Feature Pseudosarcomas
Granulation tissuelike Bizarre stromal cells Vascular proliferations Elastofibromatous abnormalities Lipomatous changes Cellular infiltrate of Eosinophilic cells benign cells Foamy cells Signet ring cells Lymphoid nodules and hyperplasia Melanocytes Bizarre stromal cells Prolapse and entrapment Mucosal prolapse syndromes Entrapment of glands Gastritis cystica profunda Enteritis cystica profunda Colitis cystica profunda Entrapment of air Pneumatosis intestinalis Pseudolipomatosis Heterotopias Normal tissue in unusual sites Diseases of the "normal" tissue appearing in unusual sites Table 3.