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4. Hrvatski kongres kliniËke citologije 4th Croatian Congress ... - Penta

4. Hrvatski kongres kliniËke citologije 4th Croatian Congress ... - Penta

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Clinical Cytology - Oral Presentations<br />

ADDITIONAL CYTOMORPHOLOGICAL CRITERIA IN DIAGNOSIS OF PILOMATRICOMA -<br />

BENIGN TUMOR WITH BAD REPUTATION<br />

Seili-Bekafigo I1 , Jonjić N2 , Štemberger C1 , Rajković-Molek K1 1 KBC Rijeka, Department of Cytology, Department.of Internal Medicine, Rijeka, Croatia<br />

2 Rijeka University School of Medicine, Department of Pathology, Rijeka, Croatia<br />

Aim. Pilomatricomas (PM) are benign skin appendageal tumors,with differentiation towards<br />

hair-forming cells,usually found in children. They are frequently misdiagnosed by<br />

clinicians, and there are many reports of false positive diagnoses made on fine needle<br />

aspirates (FNA). PM are often mistaken for «small round cell tumors in children, or for<br />

Merkel cell carcinoma, basalioma and metastatic small cell carcinoma in adults, with<br />

possible over-aggressive therapeutic approach. The aim of this study was to confirm<br />

existing and possibly add some new morphologic and morphometric characteristics of<br />

PM. Patients and methods. In 6 cases of PM, correctly diagnosed preoperatively by FNA,<br />

clinical, cytomorphologic and basic morphometric features (the longest nuclear diameter),<br />

were analyzed, and compared with 4 cases of malignant tumors with similar clinical<br />

presentation. Smears were stained according to May-Gruenwald-Giemsa (MGG) method.<br />

Results. Morphometric data did not prove to be helpful. In addition to well known<br />

cytomorphologic characteristics of PM, in all 6 cases we found basophilic cytoplasmatic<br />

protrusions, that could be useful additional cytomorphologic feature of PM. Conclusion.<br />

We concluded that cytomorphologic characteristics of PM are reliable enough for correct<br />

preoperative diagnosis in adequate specimens. The best results are achieved when<br />

FNA is performed by an experienced cytologist, considering all relevant clinical data.<br />

irena.seili-bekafigo@ri.t-com.hr<br />

105<br />

4 th <strong>Croatian</strong> <strong>Congress</strong> of Clinical Cytology / 1 st <strong>Croatian</strong> Symposium of Analytical Cytology / 2 nd <strong>Croatian</strong> Symposium of Cytotechnology

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