Bloom syndrome is diagnosed using any of three tests - the presence of quadriradial (Qr, a four-armed chromatid interchange) in cultured blood lymphocytes, and/or the elevated levels of Sister chromatid exchange in cells of any type, and/or the mutation in the BLM gene. The US Food and Drug Administration (FDA) announced on February 19, 2015 that they have authorized marketing of a direct-to-consumer genetic test from 23andMe. The test is designed to identify healthy individuals who carry a gene that could cause Bloom Syndrome in their offspring.

Bloom syndrome has no specific treatment; however, avoiding sun exposure and using sunscreens can help prevent some of the cutaneous changes associated with photo-sensitivity. Efforts to minimize exposure to other known environmental mutagens are also advisable.

alterations in lipid and

carbohydrate metabolism, a triplet-repeat disorder

(myotonic dystrophy) and an idiopathic disorder

Progeroid syndromes (PS) are a group of rare genetic disorders which mimic physiological aging, making affected individuals appear to be older than they are. The term "progeroid syndrome" does not necessarily imply progeria (Hutchinson–Gilford progeria syndrome), which is a specific type of progeroid syndrome.

"Progeroid" means "resembling premature aging", a definition that can apply to a broad range of diseases. Familial Alzheimer's disease and familial Parkinson's disease are two well-known accelerated-aging diseases that are more frequent in older individuals. They affect only one tissue and can be classified as unimodal progeroid syndromes. Segmental progeria, which is more frequently associated with the term "progeroid syndrome", tends to affect multiple or all tissues while causing affected individuals to exhibit only some of the features associated with aging.

All disorders within this group are thought to be monogenic, meaning they arise from mutations of a single gene. Most known PS are due to genetic mutations that lead to either defects in the DNA repair mechanism or defects in lamin A/C.

Examples of PS include Werner syndrome (WS), Bloom syndrome (BS), Rothmund–Thomson syndrome (RTS), Cockayne syndrome (CS), xeroderma pigmentosum (XP), trichothiodystrophy (TTD), combined xeroderma pigmentosum-Cockayne syndrome (XP-CS), restrictive dermopathy (RD), and Hutchinson–Gilford progeria syndrome (HGPS). Individuals with these disorders tend to have a reduced lifespan. Progeroid syndromes have been widely studied in the fields of aging, regeneration, stem cells, and cancer. The most widely studied of the progeroid syndromes are Werner syndrome and Hutchinson–Gilford progeria, as they are seen to most resemble natural aging.

Recently, chromatin bridges have been implied as a diagnostic marker for cancer, while having been linked to tumorigenesis in humans. This premise is based on the fact that as the mitotic cell divides and the daughter cells move further apart, stress on the DNA bridge leads to breakages in the chromosome at random points. As previously stated, the disruptions in the chromosome may lead to single chromosome mutations, including deletion, duplication and inversion, among others. This instability, defined as frequent changes in chromosomal structure and number, may be the basis of the development of cancer. While the frequency of chromatin bridges may be greater in tumor cells relative to normal cells, it may not be practical to utilize this phenomenon as a diagnostic tool. The process of staining and mounting sample cells using indirect immunofluorescence is time consuming. Even though DAPI staining is quick, neither laboratory technique can guarantee the presence of the bridges under the fluorescence microscope. The rarity of chromatin bridges, even in cancerous cells, makes this phenomenon difficult to be widely accepted diagnostic marker for cancer.

Chromatin bridges can be viewed utilizing a laboratory technique known as fluorescence microscopy. Fluorescence is the process that involves excitation of a fluorophore (a molecule with the ability to emit fluorescent light in the visible light spectrum) using ultraviolet light. After the fluorophore becomes chemically excited by the presence of UV light, it emits visible light at a specific wavelength, producing different colors. Fluorophores may be added as a molecular tag to different portions of a cell. DAPI is a fluorophore that specifically binds to DNA and fluoresces blue. In addition, immunofluorescence may be used as a laboratory technique to tag cells with specific fluorophores using antibodies, immune proteins created by B lymphocytes. Antibodies are utilized by the immune system in the identification and binding of foreign substances. Tubulin is a monomer of microtubules that compose the cellular cytoskeleton. The antibody anti-tubulin specifically binds to these tubulin monomeric subunits. A fluorophore can be chemically attached to the anti-tubulin antibody, which then fluoresces green. Numerous antibodies may bind to microtubules in order to amplify the fluorescent signal. Fluorescence microscopy allows for the observation of different components of the cell against a dark background for high intensity and specificity.