ABSTRACT
Abstract: Gastrointestinal stromal tumor is rare digestive tract mesenchymal tumor, most often in the wall of the stomach. It is a benign neoplasm, but it can become malignant if not treated. We report a case of gastrointestinal stromal tumor that was discovered after abdominal ultrasonography during staging of a patient with primary cutaneous amelanotic melanoma. Mutation in the tyrosine kinase receptor could explain the development of two types of tumors in the same patient.
Subject(s)
Humans , Male , Middle Aged , Skin Neoplasms/diagnosis , Melanoma, Amelanotic/diagnosis , Gastrointestinal Stromal Tumors/diagnosis , Gastrointestinal Neoplasms/diagnosis , Neoplasms, Multiple Primary/diagnosis , Biopsy , Immunohistochemistry , Tomography, X-RayABSTRACT
Proliferating pilomatricoma is proliferative, rare tumor variant of pilomatricoma. It is a benign neoplasm of hair matrix that can have potentially involve local recurrence. We report the case of a 60-year-old man who presented an asymptomatic nodule on the scalp. Histological exam demonstrated a basaloid epithelium at the periphery, filled with eosinophilic cornified material containing shadow cells. The tumor was excised and there was no evidence of recurrence one year later.
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