The limbs of human body is divided by 36 Dreshkanas. Any particular Dreshkan occupied by a benefic indicates a mole and a malefic an ulcer on the particular part of the physique, see Sloka 26, Ch. II of Sanketa Nidhi.

The 3 Dreshkanas in each Bhava represent limbs, respectively, as under, vide Sanketa Nidhi: a) Lagn: 1. Head 2. Neck 3. Pelvis. b) Dhan and Vyaya Bhava: 1. Right and left eyes 2. Right and left shoulders 3. Genital organs. c) Sahaj and Labh Bhava: 1. Right and left ears 2. Right and left arms. 3. Right and left testicles. d) Bandhu and Karm Bhava: 1. Right and left nostrils 2. Right and left sides (Pasharva) 3. Right and left thighs. e) Putr and Dharm Bhava: 1. Right and left cheeks 2. Right and left side of the heart 3. Right and left knees. f) Ari and Randhr Bhava: 1.Jaws 2. Right and left sides of chest 3. Right and left calves. g) Yuvati Bhava: 1. Mouth 2. Navel 3. Feet (according to some Vyaya Bhava indicates feet).

The above is from Sanketa Nidhi, Ch. IV, Slokas 124 and 125, in which it is stated, that the limb corresponding to the Dreshkan receiving a Drishti from, or yuti with a benefic will have a mole, or mark. And a malefic in such a case causes its deformity, or ulcer on it. For example, if Rahu is in Labh Bhava in first Dreshkan, denoting right ear, he can cause either deafness, or an ulcer of right ear. The reader is advantageously referred to Slokas 24, 25 and 26, Ch. V of Brihat Jataka and also my English translation of Saravali. Ch. IV for relevant information.