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A systemic, large-cell, non-Hodgkin, malignant lymphoma characterized by cells with pleomorphic appearance and expressing the CD30 ANTIGEN. These so-…

Malignant lymphoma characterized by the presence of immunoblasts with uniformly round-to-oval nuclei, one or more prominent nucleoli, and abundant cy…

A form of non-Hodgkin lymphoma having a usually diffuse pattern with both small and medium lymphocytes and small cleaved cells. It accounts for about…

Any of a group of malignant tumors of lymphoid tissue that differ from HODGKIN DISEASE, being more heterogeneous with respect to malignant cell linea…

Anaplastic lymphoma of the skin which develops as a primary neoplasm expressing the CD30 ANTIGEN. It is characterized by solitary nodules or ulcerate…

A rare neoplasm of large B-cells usually presenting as serious effusions without detectable tumor masses. The most common sites of involvement are th…

A group of heterogeneous lymphoid tumors representing malignant transformations of T-lymphocytes.

A group of lymphomas exhibiting clonal expansion of malignant T-lymphocytes arrested at varying stages of differentiation as well as malignant infilt…

A group of malignant lymphomas thought to derive from peripheral T-lymphocytes in lymph nodes and other nonlymphoid sites. They include a broad spect…

An angiocentric and angiodestructive lymphoproliferative disorder primarily involving the lungs. It is caused by an Epstein-Barr virus-induced transf…

Clinically benign, histologically malignant, recurrent cutaneous T-cell lymphoproliferative disorder characterized by an infiltration of large atypic…

Hereditary nonpolyposis colorectal neoplasms associated with other malignancies, more commonly of ovarian or uterine origin. When also associated wit…

A symptom complex associated with CARCINOID TUMOR and characterized by attacks of severe flushing of the skin, diarrheal watery stools, bronchoconstr…

A malignant neoplasm of epithelial cells of the SALIVARY GLANDS, with microcystic architecture, low-grade nuclei, and granular vacuolated cytoplasm.

Tumors or cancer of the MAMMARY GLAND in animals (MAMMARY GLANDS, ANIMAL).

Experimentally induced mammary neoplasms in animals to provide a model for studying human BREAST NEOPLASMS.

Tumors or cancer of the MANDIBLE.

A unifocal malignant tumor that consists of atypical pathological MAST CELLS without systemic involvement. It causes local destructive growth in orga…

A solid tumor consisting of a dense infiltration of MAST CELLS. It is generally benign.

A variant of cutaneous mastocytosis which occurs as a single lesion usually in infants. It is found mostly in the wrist and trunk and there is no aty…

A rare neoplastic disorder characterized by a clonal proliferation of MAST CELLS, associated with KIT-D816 mutations, and accompanied by aberrant mas…

Skin lesions due to abnormal infiltration of MAST CELLS. Cutaneous mastocytosis is confined to the skin without the involvement of other tissues or o…

A group of disorders caused by the abnormal proliferation of MAST CELLS in a variety of extracutaneous tissues including bone marrow, liver, spleen, …

Cancer or tumors of the MAXILLA or upper jaw.

Tumors or cancer of the MAXILLARY SINUS. They represent the majority of paranasal neoplasms.

Cysts of one of the parts of the mediastinum: the superior part, containing the trachea, esophagus, thoracic duct and thymus organs; the inferior mid…

Tumors or cancer of the MEDIASTINUM.

A malignant neoplasm that may be classified either as a glioma or as a primitive neuroectodermal tumor of childhood (see NEUROECTODERMAL TUMOR, PRIMI…

The triad of benign FIBROMA or other ovarian tumors with ASCITES, and HYDROTHORAX due to large PLEURAL EFFUSIONS.

A malignant neoplasm derived from cells that are capable of forming melanin, which may occur in the skin of any part of the body, in the eye, or, rar…