RESUMEN
Cyclic thrombocytopenia (CTP) is a very rare hematological disorder that is characterized by periodic fluctuations in platelet counts. Diagnosis is generally delayed due to its similarity with immune thrombocytopenia (ITP). The pathophysiology is unknown and there are currently no guidelines for management. Many patients are usually treated for ITP initially prior to diagnosis. We describe a 67-year-old female with a history of multiple episodes of transient thrombocytopenia who presented to the hospital with another episode of thrombocytopenia. Her workup including HIV, hepatitis screening, vitamin B12, and folate was negative. She received a unit of platelet transfusion and was later observed in the hospital. Further review of her chart showed similar episodes in the past with spontaneous improvement. She was diagnosed with CTP. Her platelet count improved remarkably prior to discharge. In patients with recurrent fluctuation in their platelet count, CTP should be one of the differentials as this might prevent further unnecessary therapies.
RESUMEN
Good syndrome (GS) is a rare paraneoplastic syndrome seen before or after diagnosis of thymoma, and its treatment, and is characterized by hypogammaglobulinemia. Rarely, pure white cell aplasia (PWCA) can also be seen which can present as recurrent neutropenia. We describe a 64-year-old man with recurrent sinus infections and previous thymectomy for stage 1 type B2 thymoma presenting with chronic diarrhea and recurrent neutropenia necessitating serial hospitalizations despite repeated antimicrobial treatment. Immunoglobulin levels, including IgM, IgA, IgD, and IgE were undetectable. Flow cytometry also showed absent B cells. Patient was initiated on immunoglobulin replacement therapy with consequent significant clinical improvement. Despite thymectomy, patients can develop thymoma-associated paraneoplastic syndromes, including GS.