Heart leiomyosarcoma is an aggressive malignant tumor arising from the smooth muscle cells of the heart. It is classified as a cardiac tumor and is ch...

Heart lymphoma is an extranodal lymphoma that arises from the heart and/or pericardium, most commonly presenting as a diffuse large B-cell lymphoma. A...

Heart, malformation of refers to structural abnormalities of the heart that are present at birth. This condition typically affects the heart’s anatomy...

Heart sarcoma is a malignant tumor of the heart, most often presenting as an angiosarcoma. This condition affects the cardiac tissue and can disrupt n...

Heavy chain deposition disease (HCDD) is a disorder characterized by abnormal deposits of immunoglobulin heavy chains in body tissues, most affecting...

Heavy chain disease is a rare lymphoplasma-cell proliferative disorder in which B cells produce truncated immunoglobulin heavy chains without associat...

HEC syndrome is a very rare condition that has been described in two children. It is characterized by communicating hydrocephalus (an abnormal buildup...

Heiner syndrome, also known as cow's milk hypersensitivity, is a condition that primarily affects infants. It is a type of food-induced pulmonary hype...

Heinz body anemia is a rare blood disorder characterized by the formation of abnormal clumps of hemoglobin in red blood cells, known as Heinz bodies....

Helicoid peripapillary chorioretinal degeneration is an inherited condition that affects the retina and choroid of the eye, often leading to progressi...

HELIOS deficiency is a rare, non-severe combined immunodeficiency caused by a change in the IKZF2 gene. In this condition, the gene does not work as i...

HELIX syndrome is a rare condition with several features that affect different parts of the body. The name HELIX comes from the key characteristics se...

HELLP syndrome is a serious condition that can complicate pregnancy. Its name comes from the three main features: Hemolysis (the breakdown of red bloo...

Hemangioblastoma is a rare, benign tumor that arises within the central nervous system, most commonly in the cerebellum or spinal cord. It is a highly...

Hemangioma of subcutaneous tissue is a benign growth arising from the soft tissues beneath the skin. It is categorized as a vascular anomaly that typi...

Hemangiopericytoma, malignant is an uncommon malignant neoplasm arising from pericytes, the cells that surround blood vessels. Distinguishing between...

Hematologic disorder is a condition that affects the hematopoietic system, which is the system in the body responsible for producing blood cells. This...