60yrs, male patient, clinical and histological images..

65 male, oral biopsy- right buccal alveolus, hpe images

Mole forehead, 65 years, female. Grossly 4*3 cm skin covered tissue with a blackish area of 1.5*1 cm on skin surface

65years male Edge biopsy from chronic non-healing ulcer of right foot Gross-- Two tiny bits of tissue collectively measuring 0.6 cm, blackish in colour

30 yr male with bleeding PR on & off since 6 months specimen labelled as hemorrhoids received multiple bits of tissue

A male aged 42 years complained of a swelling Rt Inguinal region. His PET Scan images are attached.Kindly comment on the images to arrive at a diagnosis...