Blastocyst: A thin-walled hollow structure in early embryonic development that contains a cluster of cells called the inner cell mass from which the embryo arises. The outer layer of cells gives rise to the placenta and other supporting tissues needed for fetal development within the uterus while the inner cell mass cells gives rise to the tissues of the body.
- Blastocystis hominis
Blastocystis hominis: The parasitic organism that causes blastocystosis. See Blastocystosis.
Blastocystosis: Infection with Blastocystis hominis, a common microscopic parasite found worldwide. Symptoms may include watery or loose stools, diarrhea, abdominal pain, anal itching, weight loss, and excess gas. Some people have no symptoms. The organism can remain in the intestines for weeks, months, or years. Diagnosis requires finding it in the stool, How Blastocystis is […]
- Blastomyces dermatitidis
Blastomyces dermatitidis: The fungus that causes a disease called blastomycosis.
Blastoma: A tumor thought to arise in embryonic tissue. This term is commonly used as part of the name for a tumor, as in glioblastoma and medulloblastoma (types of brain tumors), hepatoblastoma (a liver tumor), nephroblastoma (a Wilms tumor of the kidney), neuroblastoma (a childhood tumor of neural origin), osteoblastoma (a bone tumor), and retinoblastoma […]
Blastomycosis: Infection with a fungus called Blastomyces dermatitidis. The infection causes symptoms in about 50% of cases. It usually presents as a flu-like illness with fever, chills, productive cough, myalgia, arthralgia and pleuritic chest pain. Some patients fail to recover and develop chronic pulmonary infection or widespread disseminated infection (affecting the skin, bones, and genitourinary […]