The rhomboid flap is a useful plastic surgical technique to cover defects created by simple excisions in the shape of a rhombus. An excision by this technique of a basal cell carcinoma in the area of the lateral brow is illustrated. The mathematical basis of this flap is briefly discussed.
Bullock JD, Koss N, Flagg SV. Rhomboid Flap in Ophthalmic Plastic Surgery. Arch Ophthalmol. 1973;90(3):203-205. doi:10.1001/archopht.1973.01000050205005