Seriousness of Blood Cancer
Leukemia & Lymphoma Awareness month goes beyond wearing a colored ribbon or taping a flyer in a clinic window. Doctors should be attuned to differentials and patients must voice concerns over unexplained symptoms—perhaps insisting on accurate testing rather than empirical evaluations.
Lymphoma is a cancer of the lymphocytes (white blood cells) that typically play a key role in fighting infection. The lymphatic system is part of the circulatory system, comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph towards the heart. Collections of lymph nodes are found in the neck, underarms, chest, abdomen, and groin. Lymphatic tissue is also located in other parts of the body, including the stomach, skin, and small intestine. Beyond oncology, a multidisciplinary approach enlisting experts in cardiology, dermatology, rheumatology, neurology, immunology, and vision care is useful to optimally manage patients with rare or complex neoplasms.
There are two broad types of lymphoma—Hodgkin lymphoma (HL) or non-Hodgkin lymphoma (NHL) and many subclassifications. The main difference between HL and NHL is in the specific lymphocyte each involves. Because of so many variations, it is not uncommon for medical practitioners to offer differing diagnosis for the same symptoms or even lab results. In fact, a second opinion of pathologist biopsy interpretation (whether negative or positive) may be equally, if not more, important than a second opinion for an oncologist’s treatment plan. Differences between malignant and benign cells can be subtle and interpretations can be subjective.
People with Sjogren’s syndrome are 44 times more likely to develop non-Hodgkin lymphoma.
With about 66,000 cases diagnosed each year, non-Hodgkin lymphoma (NHL) can cause many different signs and symptoms, depending on where it is within the body. In some cases NHL might not cause any symptoms until it grows quite large. If any of the following symptoms persist more than a few days, seek medical evaluation :
The Eyes Have It
Dry eyes and aching joints can be precursors to lymphoma since people with Sjogren’s syndrome are 44 times more likely to develop NHL. If you have Sjogren’s syndrome, report any of the main early NHL symptoms to your general practitioner—a painless swelling in a lymph node (gland), usually in the neck, armpit or groin. Mucosa-Associated Lymphoid Tissue (MALT) lymphoma affects lymphatic tissue in parts of the body such as the stomach, gut, lungs and eyes. This B-cell lymphoma can, therefore, manifest dry eyes as secondary symptom.
In the United States, B-cell lymphomas (lymphocytes originating from bone marrow) account for about 85% of non-hodgkin lymphomas. The most common type is diffuse large B‑cell lymphoma (DLBCL) with average onset of 63-66 years of age. It is distinguished as a quickly growing mass within a lymph node.
Primary mediastinal B-cell lymphoma (PMBCL) accounts for only 2% of all lymphomas. It is more prevalent among women in their 30s. PMBCL is similar to DLBCL but with fibrosis and generally localized in the middle of the chest. Both types respond well to treatment. Intravascular large B‑cell lymphoma is a rare subtype of DLBCL affecting blood vessels.
Follicular lymphoma has nothing to do with the skin or hair shaft. It describes slow growing cells that form a circular pattern within lymph nodes. References provide details for additional less-common B‑cell lymphomas listed below. 
- Chronic lymphocytic leukemia /small lymphocytic lymphoma
- Mantle cell lymphoma
- Marginal zone B-cell lymphomas
- Burkitt lymphoma
- Lymphoplasmacytic lymphoma
- Hairy cell leukemia
- Primary central nervous system (CNS) lymphoma
More rare T-cell lymphomas (lymphocytes originating from thymus) make up the remaining 15% of non-hodgkin lymphomas in the United States. Precursor T-lymphoblastic lymphoma can be considered a leukemia as more bone marrow involvement increases. Since this disease often originates in the thymus, breathing and cardiovascular impediments may develop. 
Peripheral T-cell lymphomas have many subcategories:
- Cutaneous T-cell lymphomas (CTCL)
- Angioimmunoblastic T-cell lymphoma
- Extranodal natural killer/T-cell lymphoma, nasal type
- Enteropathy type intestinal T-cell lymphoma
- Anaplastic large cell lymphoma (ALCL)
- Unspecified peripheral T-cell lymphoma
Largest Organ in Lymphatic System is the Skin
Though most lymphomas manifest within internal organs, cutaneous T‑cell lymphomas (skin lymphoma or mycosis fungoides) can be observed externally. The problem with diagnosis is that there is great variation in appearance. Cutaneous pseudolymphoma is not a disease but rather an inflammatory response to known or unknown stimuli that results in a lymphomatous-appearing but benign accumulation of inflammatory cells. Pseudolymphomas often show broad patches and plaques. They often mimic cutaneous T-cell lymphoma. Examples include actinic reticuloid, lymphomatoid contact dermatitis, and lymphomatoid drug eruptions.
Mycosis fungoides (MF) makes up 72% of CTCL. Sezary syndrome is an advanced, variant form of MF, which is characterized by the presence of lymphoma cells in the blood. Extensive thin, red, itchy rashes usually cover over 80% of the body in MF.
CTCL typically presents with red, scaly patches or thickened plaques of skin that often mimic eczema or chronic dermatitis. They are generally treatable but not curable. Mycosis fungoides (no relation to fungus) initially consists of flat, pink lesions which may be oval or annular, and may be accompanied by itching and thinning of the skin. Lesions thicken and itch more in the plaque stage. The tumor stage sees the development of large, possibly ulcerated irregularly shaped lumps on plaques. Cutaneous B‑cell lymphomas (CBCL) are a less common version of cutaneous lymphomas, making up about 20-25% of all cutaneous lymphomas. [3,4]
After growing for several years, cutaneous lymphoma may become systemic and manifest itself within lymph nodes. Early diagnosis and treatment is indicated for favorable prognosis. In Practical Dermatology, Lawrence A. Mark, MD, PhD shares his method of early mycosis fungoides identification. Excerpts below:
Lymphoma Outlook and Prognosis
Slow growing lymphomas have the best early cure rate. The dichotomy is that they are generally discovered after disease has progressed to an advanced stage. High-grade aggressive lymphomas are often symptomatic early on and are potentially curable with aggressive treatments.
Because the lymphatic system extends to so many parts of the body, it may first be suspected by dermatologists, cardiologists, gastroenterologists, pulmonologist, internists, neurologists or during ob-gyn examinations. There is no specific blood test for lymphoma. Pathologists or hematologists can only observe irregularities in blood counts. Simialrly, radiology scans are useful in detecting abnormal masses but cannot distinguish between benign and malignant tumors. A constellation of tests and symptoms narrow down a diagnosis. Flow Cytometry has advanced over the past decade to a useful tool in detecting lymphoma. 
Pain is not a primary symptom. Skin lesions that do not heal, deep or surface lumps in the neck, armpits, chest, breasts, abdomen or groin should be brought to the attention of appropriate medical professionals. Diagnosis may involve a physical exam, blood tests, imaging tests, and/or surgical biopsy of a swollen lymph node or bone marrow collection to determine A or B category of four progressive stages.  It is estimated that 9,290 men and women (5,070 men and 4,220 women) were diagnosed with Hodgkin’s lymphoma in 2013.  According to the American Cancer Society, about 74,680 people, including children, (41,730 males and 32,950 females) will be diagnosed with NHL this year.
Lymphomas can migrate from one type to another (i.e. skin to lymph node) so followup examinations are important. Nevertheless, try not to panic if symptoms are discovered. Lymphomas are statistically less likely to occur than more benign differentials such as lipomas or eczema. In 2009, The National Institute of Health designed and established a multidisciplinary cutaneous lymphoma clinic (MCLC) at the Ohio State University. 
Acanthosis nigricans (AN) can cause thickening of the skin or darkening in other areas of the body, such as the neck, underarm and groin. It has a prevalence according to age, race, and body weight. In rare cases, AN can also occur because a cancerous tumor is growing in the stomach, liver, or another internal organ. This form of AN is called malignant acanthosis nigricans. 
To remain A Bit More Healthy, unusual symptoms should be professionally evaluated, particularly during September Leukemia and Lymphoma Awareness Month. See references for questions you can ask your doctor about non-Hodgkin Lymphoma  and for the best U.S. hospitals with oncolgy departments. 
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- How is non-Hodgkin lymphoma diagnosed? cancer.org
- Types of non-Hodgkin lymphoma. cancer.org
- About Cutaneous Lymphoma. clfoundation.org
- Mycosis fungoides. onlinedermclinic.com
- Mycosis Fungoides: Diagnosis and Work-up of Early Stage Disease. bmctoday.net
- The role of flow cytometry in the diagnosis of non- Hodgkin's lymphoma, Hodgkin's lymphoma, granulomatous inflammation and reactive lymph node specimens. nih.gov
- Lymphoma. wikipedia.org
- Hodgkin’s lymphoma. mayoclinic.com
- SEER Stat Fact Sheets: Hodgkin Lymphoma. seer.cancer.gov
- The Role of an Integrated Multidisciplinary Clinic in the Management of Patients with Cutaneous Lymphoma. nih.gov
- Ways to get rid of dark underarms. medicalnewstoday.com
- What should you ask your doctor about non-Hodgkin lymphoma? cancer.org
- 70 Hospitals and Health Systems With Great Oncology Programs. beckershospitalreview.com
Access all articles and references.