It is known that solid tumors are involved in the bone marrow. However, it is rare to be diagnosed with bone marrow involvement. Clinical and laboratory findings are not characteristic and may lead to the consideration of different prediagnoses. When bone marrow involvement is detected, it also affects the treatment approach and is associated with a poor prognosis. We aimed to describe the clinical and laboratory characteristics of our patients with solid tumors diagnosed with bone marrow involvement. Seven patients who underwent bone marrow biopsy with the pre-diagnosis of hematological malignancy and were diagnosed with carcinoma metastasis were evaluated retrospectively. The median age at diagnosis of 3 male and 4 female patients was 71. The mean age at diagnosis was 61,2±19,9. 6 patients presented with fatigue, 2 patients with shortness of breath, and 1 patient with anorexia. All patients had anemia, 6 patients had thrombocytopenia, 6 patients had increased sedimentation, and 3 patients had leukocytosis. Breast cancer in 4 patients, gastric carcinoma in 2 patients, and prostate carcinoma in 1 patient were detected. The median survival time of the diagnosed patients was 20 months (2-33 months). 2 breast cancer and 1 prostate cancer patients continue their lives with hormone therapy. Bone marrow biopsy; is a cheap, easily applicable and effective method for detecting diseases involving the bone marrow.