Pilomatrixoma is a rare benign skin tumor arising from hair follicle stem cells which is also known as calcifying epithelioma of Malharbe. It occurs with a rate of 0.1% among skin tumors. The definite diagnosis is made histopathologically. In treatment, it is recommended that the lesion be excised surgically. In this study, we wished to present two patients who presented with swelling and underwent excisional biopsy as a result of magnetic resonance imaging and whose pathological result was reported to be pilomatrixoma in accompaniment with the literature. (Türk Ped Arş 2014; 49: 340-3)

Primary lymphoma of the bone is an extremely rare tumor in the form of non-Hodgkin lymphoma or Hodgkin lymphoma. The majority of primary bone lymphomas are non-Hodgkin lymphoma, of which the most common subtype is diffuse large cell lymphoma. Patients can present with pain, swelling or pathologic fracture. Definitive diagnosis is made after biopsy examination. Treatment consists of chemotherapy, radiotherapy and surgery. We report 3 male patients who presented with pain and swelling. Involvement was in the distal femur, proximal fibula and iliac crest in all patients. Patients were diagnosed with non-Hodgkin lymphoma in biopsy examination and underwent chemotherapy. The patient with distal femoral involvement underwent distal femoral resection prosthesis. Another patient with involvement of the fibular head experienced foot drop and delayed wound healing. Fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography revealed complete response to the treatment. Patients are in remission and continue schooling.

Presenting with severe thrombocytopenia and pancytopenia is rare in children with brucellosis, and at the beginning it can be misdiagnosed as a hematological or a viral hemorrhagic disease. The follow-ups of 52 patients diagnosed with brucellosis from January, 2008, to December, 2013, in our clinic have shown the following results. Eleven out of these 52 patients revealed the fact that they had pancytopenia at the admission phase. Anemia and leukopenia were defined as hemoglobin levels and leukocyte counts below the standard values in terms of ages, thrombocytopenia as thrombocyte counts below 150,000/mm(3), and severe thrombocytopenia as thrombocyte counts below 20,000/mm(3). The most frequent admission symptoms and findings of the patients with pancytopenia were fever (75%), fatigue (50%), splenomegaly (75%), and hepatomegaly (41%). Laboratory results were hemoglobin 9.3±0.96 gram/dL, white blood cell count 2226±735.9/mm(3), and thrombocyte count 70,090±47,961/mm(3). The standard tube agglutination test was positive for all patients, and Brucellosis spp. were isolated in the blood cultures of six (54%) patients. Three of the 11 patients had severe thrombocytopenia, and they were admitted with complaints of epistaxis, gingival bleeding, petechiae, and purpura. At the beginning, two of three cases were misdiagnosed as Crimean-Congo hemorrhagic fever (CCHF), another zoonotic endemic disease in Turkey. Pancytopenia improved with treatment of brucellosis on all patients. In conclusion, brucellosis can show great similarity with hematologic and zoonotic diseases like CCHF. Brucellosis should be considered in the differential diagnosis of pancytopenia, treatment-resistant immune thrombocytopenia, and viral hemorrhagic disease, especially in countries where brucellosis is endemic.

Avulsion fractures of the pelvic apophyses among athletes in the adolescent period are rare injuries caused by sudden contraction of the adhesive muscles. Avulsion fracture of the anterior inferior iliac spine (AIIS) in a 15-year-old amateur athlete is presented. The patient's history revealed a sudden pain in the right hip when shooting the ball while playing football on a synthetic field. Pelvic radiograph showed avulsion fracture of the AIIS. The patient was given conservative treatment consisting of an analgesic, antiinflammatory treatment, and bed rest. The patient, who experienced pain relief following the medical treatment and bed rest for 3 weeks, was mobilised with hip exercises and on crutches. After the detection of union on radiographs taken at the end of the fourth week, he was mobilised with full weight bearing. The patient, who underwent an exercise programme, was allowed to participate in sporting activities at the end of the third month.Keywords: Anterior inferior iliac spine, avulsion fracture, conservative treatment Received: 20.10.2012 Accepted: 04.02.2013 ÖZET Adölesan dönemde sporcularda pelvisteki apofizlerde avulsiyon kırıkları yapışan kasların ani kasılması sonucu meydana gelen nadir yaralanmalardır. Yazımızda 15 yaşındaki amatör sporcuda meydana gelen anterior inferior iliak spine (AİİS) avulsiyon kırığı sunuldu. Hikayesinde halı sahada top oynarken şut çeken hastanın ani sağ kalça ağrısı geliştiği öğrenildi. Çekilen pelvis radyografisinde AİİS lokalizasyonunda avulsiyon kırığı gözlendi. Hastaya analjezik, antienflamatuar tedavi ve yatak istirahatinden oluşan konservatif tedavi uygulandı. Üç hafta ilaç kullanımı ve yatak istirahatinin ardından ağrıları azalan hastaya kalça egzersizleri ve koltuk değneği ile mobilizasyona başlandı. Dördüncü haftanın sonunda çekilen radyografide kaynama bulguları gözlenen hasta desteksiz mobilize edildi. Egzersiz programı uygulanan hastaya üçüncü ayın sonunda sportif faaliyetlerine başlaması için izin verildi.

Bilateral congenital knee dislocation is a rare deformity which may present with other musculoskeletal abnormalities. In the early period, conservative treatment options have a high chance of success. However, in later stages, surgical treatment is indicated in neglected or unresponsive cases to manipulation in the early period. Herein, we present a rare case of bilateral congenital knee dislocation which was diagnosed after birth. Retrospective examination revealed that it occurred in the antenatal period and neglected.