Authors: Felix Paolo J. Lizarondo, MD, Paola S. Young, MD, Georgina C. Pastorfide, MD, FPDS, Cynthia Ciriaco-Tan, MD, FPDS
Introduction: Trichoblastoma is an uncommon benign neoplasm largely composed of follicular germinative cells. Pigmented trichoblastoma or a melanotrichoblastoma is a rare variant with only few reported cases in the literature.
Case Summary: A 58 year old Filipino male consulted for a 2 year history of a black papule on the left shoulder gradually enlarging to a bluish-black tumor with no associated symptoms of pain or pruritus. On physical examination, there is a solitary well demarcated irregularly shaped black smooth surfaced tumor on the left shoulder measuring 1.2 x 1.3 x 0.5 cm. Dermoscopy revealed bluish-black globules and yellowish-white central structureless areas. A 4mm punch biopsy was done showing lobules of basaloid cells with peripheral palisading and melanin pigment within the lobules, associated with a fibromyxoid stroma. Trichoblastoma was the initial histopathologic diagnosis. Since melanin deposition is an uncommon feature of trichoblastoma, a pigmented basal cell carcinoma was also a consideration. To completely rule out a basal cell carcinoma, wide excision with 5 mm margins was done with full thickness graft from the inguinal area. With a larger area of histologic tissue demonstrating no connection to the epidermis, absence of retraction artifact and the presence of fibromyxoid stroma, basal cell carcinoma was ruled out and a final histopathologic diagnosis of a pigmented trichoblastoma was given. Post-operatively, the graft had a good uptake and there was no recurrence of the lesion.
Conclusion: This case describes the clinico-pathologic and dermoscopic features of a rare variant of an already rare tumor: a pigmented trichoblastoma.
pigmented trichoblastoma, melanotrichoblastoma, trichoblastoma
Authors: Katrina Carmela M. Belen, MD, DPDS, Jasmin J.Jamora, MD, FPDS , Ma. Cecilia P. Ingente MD, DPDSAbstractBackground: Dermoscopy, a non-invasive diagnostic tool, has been proven to improve the diagnostic accuracy of vascular tumors since it can aid in...
A randomized, double-blind, comparative study on the safety and efficacy of virgin coconut (Cocos nucifera l.) oil against 1% hydrocortisone lotion as an anti-inflammatory and antipruritic preparation for mosquito reactions
Authors: Uy, Veronica S, MD; Gracia B. Teodosio, MD, FPDS; Ma. Teresita G. Gabriel, MD, FPDS; Mary Catherine T. Galang, MD; Mohammad Yoga A. Waskito, MD; Johannes F. Dayrit, MD, FPDS Abstract Background: Virgin coconut oil (VCO) has been reported...
Primary Cutaneous Anaplastic Large Cell Lymphoma (PC-ALCL) is a rare Non-Hodgkin lymphoma (NHL) representing approximately 9% of all cutaneous lymphomas.3 It usually manifests as a slow-growing, solitary tumor which has a tendency to regress spontaneously. However, metastasis is reported in 5-10% of cases.