I think there's something growing inside my right leg. There's a lump going on the size of a spaghetti squash-it's like 15-20 pounds on my right leg; I had my first Pfizer COVID vaccine done July of last year 2021. 5 months later I had my 2nd Pfizer vaccine shot on 16Dec2021; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team, Program ID: (159558). The reporter is the patient.  A 41-year-old male patient received BNT162b2 (BNT162B2), on 16Dec2021 as dose 2, single (Batch/Lot number: unknown) at the age of 41 years for covid-19 immunisation. The patient's relevant medical history included: "genetic blood disease" (unspecified if ongoing), notes: I have a genetic blood disease where if I cut myself, I can easily bleed to death. The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (I had my first Pfizer COVID vaccine done July of last year 2021), administration date: Jul2021, when the patient was 40 years old, for Covid-19 immunization. The following information was reported: INAPPROPRIATE SCHEDULE OF PRODUCT ADMINISTRATION (non-serious) with onset 16Dec2021, outcome "unknown", described as "I had my first Pfizer COVID vaccine done July of last year 2021. 5 months later I had my 2nd Pfizer vaccine shot on 16Dec2021"; LIMB MASS (non-serious) with onset 20Dec2021, outcome "unknown", described as "I think there's something growing inside my right leg. There's a lump going on the size of a spaghetti squash-it's like 15-20 pounds on my right leg". The event "i think there's something growing inside my right leg. there's a lump going on the size of a spaghetti squash-it's like 15-20 pounds on my right leg" required physician office visit. Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: It was reported that, the patient had his first Pfizer vaccine done in July2021 (last year) and then he was told by his doctor to get the second one four months later. So he had the second one on 16Dec2021 (last year) and then next three days later it was fine nothing wrong with his body then on the fourth day on 20Dec2021 (last year) on the fourth day he went to the bathroom and he told his mother, he thought he had a problem. He thought something was growing inside his right leg and he went to her room and he showed it to her. He let his shorts leg up and showed it to her and she told him there was a lump on inside his right leg beside those and he went to the doctor and ask if this could be due to the side effects of the second Pfizer vaccine shot that he had done and the doctor said no. He told he didn't think that it was. The doctor told him the only way to get it taken care of was to cut it off. The plastic surgeon back in March said they could just cut it off the same day. The patient had a genetic blood disease where if he cut himself, he could easily bleed to death. The patient was waiting for new doctor to get a new ultrasound done and find a different plastic surgeon. He thought it was due to the side effects because a friend of him had one done an she discovered almost the same thing similar to that he had it was on his right leg and she had a lump on her arm. The patient said that it was so big on the inside of his right leg like the size of a spaghetti squash, it was like 15-20 pounds on his right leg. Was it possible that this what he had on his right leg side effects from the second Pfizer vaccine shot done because he had the first Pfizer vaccine shot done July last year then he had second one done five month. Later, he just wanted to know.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.