Dermatopathology is a joint subspecialty of dermatology and pathology or surgical pathology that focuses on the study of cutaneous diseases at a microscopic and molecular level. It also encompasses analyses of the potential causes of skin diseases at a basic level.
Cytopathology is a branch of pathology that studies and diagnoses diseases on the cellular level. Cytopathology is generally used on samples of free cells or tissue fragments.
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Gastrointestinal pathology is the subspecialty of surgical pathology which deals with the diagnosis and characterization of neoplastic and non-neoplastic diseases of the digestive tract and accessory organs, such as the pancreas and liver.
Hematopathology or hemopathology is the study of diseases and disorders affecting blood cells, their production, and any organs and tissues involved in hematopoiesis, such as bone marrow, the spleen, and the thymus.
Clinical chemistry is a quantitative science that is concerned with measurement of amounts of biologically
important substances (called analytes) in body fluids. The methods to measure these substances are carefully
designed to provide accurate assessments of their concentration. The results of clinical chemistry tests are
compared to reference intervals or a medical decision level (MDL) to provide diagnostic and clinical meaning
for the values.
Immunopathology is a branch of medicine that deals with immune responses associated with disease. It includes the study of the pathology of an organism, organ system, or disease with respect to the immune system, immunity, and immune responses.

Kidney pathology is a subspecialty of anatomic pathology that deals with the diagnosis and characterization of medical diseases of the kidneys. In the academic setting, renal pathologists work closely with nephrologists and transplant surgeons, who typically obtain diagnostic specimens via percutaneous renal biopsy.
Molecular pathology is an emerging discipline within pathology which is focused in the study and diagnosis of disease through the examination of molecules within organs, tissues or bodily fluids.
Immunohistochemistry is the most common application of immunostaining. It involves the process of selectively identifying antigens in cells of a tissue section by exploiting the principle of antibodies binding specifically to antigens in biological tissues.