Viral infection: A marginally elevated white blood cell (WBC) count and lymphatic count can be indicative of a viral infection, which is a common and often self-limiting condition. Many viral infections, such as the common cold or flu, can cause a mild increase in WBCs, particularly lymphocytes.

Chronic stress or anxiety: Stress and anxiety can lead to a mild elevation in WBC count due to the body's stress response, which includes the release of cortisol and other hormones that can affect immune cell distribution.
Mild allergic reactions: Allergic reactions can cause an increase in eosinophils, a type of WBC, but may also result in a mild elevation of the total WBC count and lymphatic count.
Sleep deprivation or fatigue: Lack of sleep or chronic fatigue can affect immune function, potentially leading to mild changes in WBC counts.
Mild infections (bacterial or fungal): Early stages of bacterial or fungal infections might present with marginally elevated WBC and lymphatic counts before the condition progresses.

Hodgkin lymphoma or non-Hodgkin lymphoma: Although less common, any elevation in lymphatic count warrants consideration of lymphomas, as early detection significantly improves prognosis.
Leukemia (chronic lymphocytic leukemia, CLL): A persistent elevation in lymphocyte count, even if marginal, should prompt an investigation for CLL, a type of cancer that can be asymptomatic for years.
Infectious mononucleosis (mono): Caused by Epstein-Barr virus (EBV), mono can present with a mild increase in WBC and lymphatic counts, and it's crucial to diagnose due to potential complications like splenic rupture.
Tuberculosis (TB): TB can cause a mild elevation in WBC count and may affect lymph node counts; it's a critical diagnosis not to miss due to its public health implications and the need for specific treatment.

Lymphoproliferative disorders: These are rare conditions characterized by an excessive proliferation of lymphocytes, which could present with elevated lymphatic counts.
Primary immunodeficiency diseases: Certain immunodeficiencies can lead to abnormal WBC counts, including elevations in lymphocytes.
Castleman disease: A rare disorder that involves an overgrowth of cells in the body's lymph nodes, which can cause an elevation in lymphatic counts.
Cytokine release syndrome: A condition that can occur due to an overactive immune response, leading to elevated WBC counts among other symptoms.